Electric flipper?

If a timing belt slips, especialy under load, it's a bad design.

As long as I design it properly it might work, may be onto something here ;)

If you design a setup that uses a timing belt that has to slip under overload, you're including slip clutches.

Using a timing belt in a set-up that needs slippage, is like using Big Ben as a stopwatch

It depends really, I could just use gears and use a ESC that has automatic return?