diff --git a/README.md b/README.md
index 9ff8d00..0859758 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 Rust implementation for the IEEE 802.15.4 protocol.
 
 We're just setting this up as an open source project and we're looking for funding to work on this implementation.  
-If you want to see this implementation finished like us, contact us: dion@tweedegolf.com.
+If you want to see this implementation finished like us or know someone who does, contact us: dion@tweedegolf.com.
 
 Initial development paid for by [Rocsys](https://www.rocsys.com/).
 
@@ -27,29 +27,36 @@ There's lots there already, but not enough is implemented to be useful to anyone
 Rows with a bullet in the MVP column are required for a reasonable minimum implementation.
 The list is probably not exhaustive.
 
-| Status | Feature                 |  MVP  | Notes                                                             |
-| :----: | :---------------------- | :---: | :---------------------------------------------------------------- |
-|  ✅/🚧   | Phy trait               |   ⦿   | Radio abstraction in good shape, but might need some more changes |
-|   ✅    | Phy PIB                 |   ⦿   |                                                                   |
-|   ✅    | Mac PIB                 |   ⦿   |                                                                   |
-|   ✅    | SAP message definitions |   ⦿   |                                                                   |
-|   ✅    | MLME reset              |   ⦿   |                                                                   |
-|   ✅    | MLME set                |   ⦿   |                                                                   |
-|   ✅    | MLME get                |   ⦿   |                                                                   |
-|   ✅    | MLME start              |   ⦿   |                                                                   |
-|   🚧    | MLME scan               |   ⦿   | Active and passive implemented, ED and orphan scans still todo    |
-|   ❌    | MLME associate          |   ⦿   |                                                                   |
-|   ❌    | MLME disassociate       |   ⦿   |                                                                   |
-|   ❌    | MLME sync               |   ⦿   |                                                                   |
-|   ❌    | MLME poll               |   ⦿   |                                                                   |
-|   ❌    | MCPS data               |   ⦿   |                                                                   |
-|   ❌    | MLME orphan             |       |                                                                   |
-|   ❌    | MLME gts                |       |                                                                   |
-|   ❌    | MLME dps                |       |                                                                   |
-|   ❌    | MLME comm status        |       |                                                                   |
-|   ❌    | MLME calibrate          |       |                                                                   |
-|   ❌    | MLME beacon notify      |       |                                                                   |
-|   ❌    | MLME sounding           |       |                                                                   |
-|   ❌    | MCPS purge              |       |                                                                   |
+| Status | Feature                 |  MVP  | Notes                                                             | Effort estimation* |
+| :----: | :---------------------- | :---: | :---------------------------------------------------------------- | :----------------- |
+|  ✅/🚧   | Phy trait               |   ⦿   | Radio abstraction in good shape, but might need some more changes |                    |
+|   ✅    | Phy PIB                 |   ⦿   |                                                                   |                    |
+|   ✅    | Mac PIB                 |   ⦿   |                                                                   |                    |
+|   ✅    | SAP message definitions |   ⦿   |                                                                   |                    |
+|   ✅    | MLME reset              |   ⦿   |                                                                   |                    |
+|   ✅    | MLME set                |   ⦿   |                                                                   |                    |
+|   ✅    | MLME get                |   ⦿   |                                                                   |                    |
+|   ✅    | MLME start              |   ⦿   |                                                                   |                    |
+|   🚧    | MLME scan               |   ⦿   | Active and passive implemented, ED and orphan scans still todo    |                    |
+|   ❌    | Data request support    |   ⦿   |                                                                   | 4 days             |
+|   ❌    | Acknowledgement support |   ⦿   | Including retransmissions                                         | 3 days             |
+|   ❌    | MLME associate          |   ⦿   |                                                                   | 4 days             |
+|   ❌    | MLME disassociate       |   ⦿   |                                                                   | 4 days             |
+|   ❌    | MLME poll               |   ⦿   | Builds on the 'data request support'                              | 1 day              |
+|   ❌    | MCPS data               |   ⦿   | Builds on the 'data request support'                              | 2 days             |
+|   ❌    | MLME sync               |       |                                                                   | 6 days             |
+|   ❌    | PAN id conflict         |       |                                                                   | 2 days             |
+|   ❌    | MLME orphan             |       | Including coordinator realignment, builds on 'PAN id conflict'    | 5 days             |
+|   ❌    | MLME gts                |       | Including full gts handling                                       | 4 days             |
+|   ❌    | MLME beacon notify      |       |                                                                   | 2 days             |
+|   ❌    | MLME comm status        |       |                                                                   | 1 day              |
+|   ❌    | MCPS purge              |       |                                                                   | 1 day              |
+|   ❌    | MLME dps                |       |                                                                   | 2 days             |
+|   ❌    | MLME calibrate          |       |                                                                   | 1 day              |
+|   ❌    | MLME sounding           |       |                                                                   | 1 day              |
+|   ❌    | Promiscuous mode        |       |                                                                   | 1 day              |
 |  🚧/❌   | Frame security          |       | Parts implemented, but not enabled. Unclear how much work is left |
-|   🚧    | Testing                 |       | Lots being tested, but can be structured better                   |
+|   🚧    | Testing                 |       | Lots being tested, but can be structured better                   |                    |
+
+_* The estimation is rough. Past experience has tought us that often things turn out to be more complex than they seem at first._
+_If that keeps happening for everything, the real work could be 2x the estimation._