Feels like I build one of these things every 8 months. I spend more time building sticks than I do actually playing anything.
Custom 3D printed parts. Custom joystick. Heavily modded chassis. Automotive vinyl. More inhaled plastic due to drilling/dremeling than is probably healthy. Easily the most advanced build I've ever done. This should hold me over until I come up with another needlessly difficult project.
More info here if anyone's interested.