@baldfatdad The problem with off the shelf components is quality, we wanted to make it as high quality as possible to avoid any parts breaking. Would it help if we incorporated some sort of maintenance team whose job is to pretty much take care of any problems personally? Also, we do have a chair and we already made a prototype that works on the chair. ....one problem...We got one of the common 'folding chairs'..little did we know that the most common chairs are the Rigid Frame so we had to go back to the drawing board this week to change the mounts.. lol rookie mistake. I really like the idea of getting in the chair myself for at least a few days. I'm going to do that this week. Spend 3 days in the chair. I think that will really help in the design. Thank you for that suggestion