I have mine in the IW-RF100 - it basically works - with a couple of modifications.
The RAM is fine, but the fan mount needs to be reversed, and then the board raised off of the standoffs by a few mm as the board has mechanical interference with the fan mounting posts.
The other issue I think may come up is the heat sink fins are the wrong way to the air flow, so it may limit performance down the line a bit - I am still building / prototyping the os, so I haven’t hit any major temperatures yet.
If you do get a drawing of the IO shield that would be great - happy to release any dxf / stl files I create for 3d printing or cutting. Right now, I am trying to measure everything, which is a bit tedious, and slightly error prone