diff --git a/src/greaseweazle/image/a2r.py b/src/greaseweazle/image/a2r.py
index 5a9fdfc0..4fccf8b6 100644
--- a/src/greaseweazle/image/a2r.py
+++ b/src/greaseweazle/image/a2r.py
@@ -74,9 +74,10 @@ class A2R(Image):
     read_only = True
 
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
         self.to_track: Dict[Tuple[int,int], A2RTrack] = dict()
-    
+        self.filename = name
+
 
     def process_rwcp(self, dat: bytes) -> None:
 
@@ -117,7 +118,7 @@ def from_file(cls, name: str, _fmt) -> Image:
                     'A2R: Invalid signature')
         dat = dat[8:]
 
-        a2r = cls()
+        a2r = cls(name)
 
         # Extract the RWCP chunk(s).
         while len(dat) > 8:
diff --git a/src/greaseweazle/image/caps.py b/src/greaseweazle/image/caps.py
index 1c470cb5..09687383 100644
--- a/src/greaseweazle/image/caps.py
+++ b/src/greaseweazle/image/caps.py
@@ -165,7 +165,8 @@ class CAPS(Image):
 
     read_only = True
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
+        self.filename = name
         self.lib = get_libcaps()
 
     def __del__(self) -> None:
@@ -186,7 +187,7 @@ def get_track(self, cyl: int, head: int) -> Optional[MasterTrack]:
     @classmethod
     def from_file(cls, name: str, _fmt) -> Image:
 
-        caps = cls()
+        caps = cls(name)
         errprefix = f'CAPS: {cls.imagetype}'
 
         caps.iid = caps.lib.CAPSAddImage()
diff --git a/src/greaseweazle/image/edsk.py b/src/greaseweazle/image/edsk.py
index a95bbc05..783857d5 100644
--- a/src/greaseweazle/image/edsk.py
+++ b/src/greaseweazle/image/edsk.py
@@ -162,9 +162,10 @@ def verify_track(self, flux):
 
 class EDSK(Image):
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
         self.to_track: Dict[Tuple[int,int],
                             Union[ibm.IBMTrack,EDSKTrack]] = dict()
+        self.filename = name
 
     # Find all weak ranges in the given sector data copies.
     @staticmethod
@@ -292,7 +293,7 @@ def from_file(cls, name: str, _fmt) -> Image:
         with open(name, "rb") as f:
             dat = f.read()
 
-        edsk = cls()
+        edsk = cls(name)
 
         sig, creator, ncyls, nsides, track_sz = struct.unpack(
             '<34s14s2BH', dat[:52])
@@ -353,7 +354,7 @@ def from_file(cls, name: str, _fmt) -> Image:
                         num_copies = (3 if data_size == 49152
                                       else data_size // native_size)
                         data_size //= num_copies
-                        weak = cls().find_weak_ranges(sec_data, data_size)
+                        weak = EDSK.find_weak_ranges(sec_data, data_size)
                         sec_data = sec_data[:data_size]
                     sectors.append((c,h,r,n,errs,sec_data))
                     # IDAM
@@ -434,9 +435,9 @@ def from_file(cls, name: str, _fmt) -> Image:
                         ngap3 += 1
 
                 # Special track handlers
-                special_track = cls()._build_8k_track(sectors)
+                special_track = EDSK._build_8k_track(sectors)
                 if special_track is None:
-                    special_track = cls()._build_kbi19_track(sectors)
+                    special_track = EDSK._build_kbi19_track(sectors)
                 if special_track is not None:
                     track = special_track
                     break
diff --git a/src/greaseweazle/image/hfe.py b/src/greaseweazle/image/hfe.py
index 48946cc9..d53b3a16 100644
--- a/src/greaseweazle/image/hfe.py
+++ b/src/greaseweazle/image/hfe.py
@@ -160,8 +160,9 @@ class HFE(Image):
 
     opts: HFEOpts
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
         self.opts = HFEOpts()
+        self.filename = name
         # Each track is (bitlen, rawbytes).
         # rawbytes is a bytes() object in little-endian bit order.
         self.to_track: Dict[Tuple[int,int], HFETrack] = dict()
@@ -184,7 +185,7 @@ def from_file(cls, name: str, _fmt):
         error.check(0 < n_cyl, "HFE: Invalid #cyls")
         error.check(0 < n_side < 3, "HFE: Invalid #sides")
 
-        hfe = cls()
+        hfe = cls(name)
         hfe.opts.bitrate = bitrate
         hfe.opts.version = version
 
diff --git a/src/greaseweazle/image/image.py b/src/greaseweazle/image/image.py
index eef7a4bf..3dfe55c7 100644
--- a/src/greaseweazle/image/image.py
+++ b/src/greaseweazle/image/image.py
@@ -35,6 +35,8 @@ def w_set(self, filename: str, opt: str, val: str) -> None:
 
 class Image:
 
+    filename: str
+    noclobber = False
     default_format: Optional[str] = None
     read_only = False
     write_on_ctrl_c = False
@@ -42,7 +44,7 @@ class Image:
 
     ## Context manager for image objects created using .to_file()
 
-    def __enter__(self):
+    def __enter__(self) -> Image:
         self.file = open(self.filename, ('wb','xb')[self.noclobber])
         return self
 
@@ -65,8 +67,7 @@ def __exit__(self, type, value, tb):
     def to_file(cls, name, fmt, noclobber):
         error.check(not cls.read_only,
                     "%s: Cannot create %s image files" % (name, cls.__name__))
-        obj = cls()
-        obj.filename = name
+        obj = cls(name)
         obj.fmt = fmt
         obj.noclobber = noclobber
         return obj
diff --git a/src/greaseweazle/image/imd.py b/src/greaseweazle/image/imd.py
index b470f5ca..00d40a96 100644
--- a/src/greaseweazle/image/imd.py
+++ b/src/greaseweazle/image/imd.py
@@ -24,10 +24,9 @@ class IMDMode:
 
 class IMD(Image):
 
-    def __init__(self, name: str, noclobber=False):
+    def __init__(self, name: str):
         self.to_track: Dict[Tuple[int,int],ibm.IBMTrack_Fixed] = dict()
         self.filename = name
-        self.noclobber = noclobber
 
 
     @classmethod
@@ -116,7 +115,9 @@ def from_file(cls, name: str, _fmt) -> Image:
 
     @classmethod
     def to_file(cls, name: str, fmt, noclobber: bool) -> Image:
-        return cls(name, noclobber=noclobber)
+        obj = cls(name)
+        obj.noclobber = noclobber
+        return obj
 
 
     def get_track(self, cyl: int, side: int) -> Optional[ibm.IBMTrack_Fixed]:
diff --git a/src/greaseweazle/image/img.py b/src/greaseweazle/image/img.py
index b1beba3a..2f8e96e5 100644
--- a/src/greaseweazle/image/img.py
+++ b/src/greaseweazle/image/img.py
@@ -18,13 +18,12 @@ class IMG(Image):
     sequential = False
     min_cyls: Optional[int] = None
 
-    def __init__(self, name: str, fmt, noclobber=False):
+    def __init__(self, name: str, fmt):
         self.to_track: Dict[Tuple[int,int],codec.Codec] = dict()
         error.check(fmt is not None, """\
 Sector image requires a disk format to be specified""")
         self.filename = name
         self.fmt: codec.DiskDef = fmt
-        self.noclobber = noclobber
 
 
     def track_list(self):
@@ -65,7 +64,9 @@ def from_file(cls, name: str, fmt: Optional[codec.DiskDef]) -> Image:
     def to_file(cls, name: str, fmt, noclobber: bool) -> Image:
         error.check(not cls.read_only,
                     "%s: Cannot create %s image files" % (name, cls.__name__))
-        return cls(name, fmt, noclobber=noclobber)
+        obj = cls(name, fmt)
+        obj.noclobber = noclobber
+        return obj
 
 
     def get_track(self, cyl: int, side: int) -> Optional[codec.Codec]:
diff --git a/src/greaseweazle/image/kryoflux.py b/src/greaseweazle/image/kryoflux.py
index b1664e24..6a3635b9 100644
--- a/src/greaseweazle/image/kryoflux.py
+++ b/src/greaseweazle/image/kryoflux.py
@@ -33,7 +33,7 @@ class OOB:
 
 class KryoFlux(Image):
 
-    def __init__(self, name):
+    def __init__(self, name: str) -> None:
         m = re.search(r'\d{2}\.[01]\.raw$', name, flags=re.IGNORECASE)
         error.check(
             m is not None,
@@ -41,7 +41,9 @@ def __init__(self, name):
             Bad Kryoflux image name pattern '%s'
             Name pattern must be path/to/nameNN.N.raw (N is a digit)'''
             % name)
+        assert m is not None # mypy
         self.basename = name[:m.start()]
+        self.filename = name
 
 
     @classmethod
diff --git a/src/greaseweazle/image/msa.py b/src/greaseweazle/image/msa.py
index 988f0f69..e28477df 100644
--- a/src/greaseweazle/image/msa.py
+++ b/src/greaseweazle/image/msa.py
@@ -15,11 +15,10 @@
 
 class MSA(Image):
 
-    def __init__(self, name: str, fmt=None, noclobber=False):
+    def __init__(self, name: str, fmt=None):
         self.to_track: Dict[Tuple[int,int],ibm.IBMTrack_Fixed] = dict()
         self.filename = name
         self.fmt = fmt
-        self.noclobber = noclobber
 
 
     @classmethod
@@ -92,7 +91,9 @@ def from_file(cls, name: str, _fmt) -> Image:
 
     @classmethod
     def to_file(cls, name: str, fmt, noclobber: bool) -> Image:
-        return cls(name, fmt, noclobber)
+        obj = cls(name, fmt)
+        obj.noclobber = noclobber
+        return obj
 
 
     def get_track(self, cyl: int, side: int) -> Optional[ibm.IBMTrack_Fixed]:
diff --git a/src/greaseweazle/image/scp.py b/src/greaseweazle/image/scp.py
index 64140962..3c524aec 100644
--- a/src/greaseweazle/image/scp.py
+++ b/src/greaseweazle/image/scp.py
@@ -111,11 +111,12 @@ class SCP(Image):
     opts: SCPOpts
 
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
         self.opts = SCPOpts()
         self.nr_revs: Optional[int] = None
         self.to_track: Dict[int, SCPTrack] = dict()
         self.index_cued = True
+        self.filename = name
 
     
     def side_count(self) -> List[int]:
@@ -180,7 +181,7 @@ def from_file(cls, name: str, _fmt) -> Image:
                     splices = struct.unpack('<168I', dat[pos+4:pos+169*4])
                 pos += chk_len
 
-        scp = cls()
+        scp = cls(name)
 
         for trknr in range(len(trk_offs)):
             
diff --git a/src/greaseweazle/image/td0.py b/src/greaseweazle/image/td0.py
index aca86ce2..8ff3a546 100644
--- a/src/greaseweazle/image/td0.py
+++ b/src/greaseweazle/image/td0.py
@@ -22,8 +22,9 @@ class TD0(Image):
 
     read_only = True
 
-    def __init__(self) -> None:
+    def __init__(self, name: str) -> None:
         self.to_track: Dict[Tuple[int,int],ibm.IBMTrack_Fixed] = dict()
+        self.filename = name
 
 
     @classmethod
@@ -32,7 +33,7 @@ def from_file(cls, name: str, _fmt) -> Image:
         with open(name, "rb") as f:
             dat = f.read()
 
-        td0 = cls()
+        td0 = cls(name)
 
         # Check and strip the header
         sig, td_ver, data_rate, stepping, n_sides, crc = struct.unpack(