Years ago, a camera gimbal. One of those DIY kits at less than a quarter of the price of name brands.

Spent hours messing around with the physical rig and software settings, but the balance was never quite right.

I'd imagine that the kits today are better all-around. At the time it was pretty cutting edge and the idea of being able to do steadicam shots with my DSLR but on a budget I could afford was too good to be true.