Hey guys...I MAY -time permitting- start working on a homebuilt throttle quadrant this weekend, but I've got no idea where to start....any suggestions?

Ideally it would be either a twin or quad-engined commercial jet sim.  But I'm not necessarily locked into that if I can come up with a better idea.  I'm also intrigued by helos.

My tech-pertise level is probably intermediate.  I'm not a complete noob in building stuff, but I usually need to follow the directions as I go.  lol