[KenWittlief]

I think you are trying to overengineer a solution that is not really the solution you want.

the real problem is your sensors (for whatever reason) were unreliable. You need to find more robust devices, and find ways to attach your cables (tiewraps and doublesidedstickytape holddowns) so they stay attached.

In engineering if a component is critical the common solution is to have more than one - problem is, to be able to tell which one has failed, you need at least 3 - then when one sensor no longer agrees with the other two you ignore it (triple/redunant sensors)

for flight control systems they use quad redundant systems in aircraft

isnt that what you really want, for the bot to work and the loop to stay closed all the time? anything else would be a kludge - if the kludge is good enough, then why use the sensor in the first place?

but I think if you solved the reliability problems, the root cause of your failures, we would not be having this discussion at all - the best solution would be more robust pots attached in a manner that wont destroy them (couplers that can flex a bit maybe?)