<- gallery of parts
I've been wanting to try and make a mount for space gaming to go with my office chair - a Steelcase Leap. The organic-ish arms didn't make an easy way to create a clamp system, but in fooling around with it recently I noticed I could remove the armrest pads and they had a nice 4-bolt pattern. Since this is my office chair I need to be able to swap in or out of gaming setup easily.
I added a 30mm tall adapter that lets me slide a 6mm x 30mm (actually, 1/4x1-1/4) bar in and secure at the back, with a plate adapter to mount my old HOTAS4 to the bar, and a pin at at the rear for quick release.
The plates and adapters are eSun PLA+ which is fairly stiff but has some durability/ductility to it. The bar was supposed to be 6061-T6 aluminum but I was lazy and didn't feel like making a mess in the shop, ripping down some surplus plate I have, and I was too cheap to go out and buy 1/4x1-1/4 steel bar stock so I decided to print the bars from PAHT-CF (high temp nylon with carbon fiber). The 385mm bars just barely fit diagonally on my CR-10s.
Good chair. I'm still using a refurb V1 that was surplus from an office supply place 6 years ago I think it was maybe $200 or $300. I replaced the original armrests 3 years ago for under 40 bucks, and I'm on my second replacement $20 cylinder. Everything else has been perfect. I harvested a HM Mirra 1 for free when our office's lease was up (tried to grab an Aeron, but they said only the Mirras were for the taking), and my wife has a Steelcase Gesture, but I think I like the leap better than any of them.