Kerbal Space Program

I'd love to make the contract system capable of failing a mission once you've destroyed the one or two prototypes you get of a part to test.

I haven't been able to find a way to achieve this with modding. Contracts would need a counter for the number of parts, which is decremented when the part (or the vessel it's a part of ) is destroyed. So you can recover parts and try again, but not discard them.

The main goal here is to make part test missions an actual challenge, and as a side effect to stop part test missions acting to bypass science requirements.