May I ask why you went with mini-itx? There looks to be plenty of room for at least a micro-atx, which would probably be cheaper and have greater expandability. Great job anyhow.
If you want a wooden wrist rest that isn’t too expensive you could always make one. I can’t imagine it would be too difficult because it’s essentially just a single piece of wood.
I mainly play engineer both for the versatility and for the ability to place turrets and platforms. The platforms in particular open up a lot of options for traversal. The engineer also has access to some of the coolest weapons in the game in my opinion.
I would personally be more interested in flip phones if they could stop insisting upon the foldable screen and instead committed to giving it 2 screens with a thin bezel. That way you wouldn't have to worry about a crease forming in the middle of the screen.