Thanks!
The stamina was actually mostly there to disincentivise players from just wailing as hard as they could on the crank - I tend to feel like there's a line between "Playing games with a crank is really fun" and "Oh boy I feel like I'm going to accidentally scrape all the plastic off the side of this console" that I wanted to try to ensure people stayed on the right side of and that immediate feedback felt like a good solution to it.