This is a Steam Deck mount for my Gridfinideck Platform (check profile for more info).

This is rev 3 and I suspect I'll eventually make a rev 4. It was specifically designed to hold the Steam Deck as compact as possible and allow the Gridfinideck to fold. When the Steam Deck is mounted and Logitech keyboard (pictured) is used the whole assembly can close and latch, but the Steam Deck joysticks will push into the keyboard. This will make everything stay in place when folded up, but it also makes me uncomfortable. I've been thinking about printing some joystick supports to prevent the sticks from being compressed too much.

Misc Note: My Deck has a leather D-Brand skin which adds some thickness. It's possible that the fit on your deck will be slightly loose because of this. Let me know!