Playseat Challenge Accessories Bracket

The playseat challenge has no way to directly attach accessories such as: handbrake, H pattern shifter and a sequential shifter so I needed a solution for it.
The ideal place to attach the part has a weird shape so I used someone else's part to get that shape right. This part.
I "traced" the playseat structure from that part and did my own. Still very influenced by that one. Click here to download it.

Given that I would be yanking on a handbrake I required some reinforcing so I left some holes to fill with threaded rods that should support those forces. I'm no engineer so I just did whatever felt would work.