Add second arena region

[nickswalker]

The current arena covers us through most of what we'll need for testing. If we make another aluminum order, it would be nice to

• Have more right angles so it wobbles less
• Have enough to slice out a second room inside the arena. This'll let us test things relating to transitioning between rooms which come up in GPSR ("find the apple in the kitchen and bring it to Bill in the living room").

Current and proposed layout (source):

[csemecu]

This is a really good idea!

If I might suggest, we could add the "second door" space closer to the left wall instead of the right so the door spapces are not aligned. I can definitely get more of the board material to wall the aluminum frames.

[nickswalker]

@csemecu made the observation that the side that is bowing is also the side where the aluminum is leaning into the arena slightly, and that this might be putting more stress on the tape/ram board. This makes a lot of sense to me, so adding extra right angles to keep the frame more rigid could kill two birds (#10).

[nickswalker]

@vinitha910 Can we make the order this week? Would like to have the region in place in about 2 weeks for prepping our first GPSR milestone