How do you estimate (or measure) torque on connector screws?
Put another way: how do you teach an apprentice what the correct torque feels like?

I discover I over-tightened some screws on the grounding bus bar of our panel; one #12 was crushed beyond flat. On the other hand, I'm going to be using some Al connectors that call for 35 and 50 in-lb. So it's time to get my torques right.

Could buy (or perhaps rent) an automotive torque wrench, but there's probably a better way...

Thanks much for all your advice! Reading this forum has been very helpful.

P.S. All of these use a slotted drive. I will use emery paper and Noalox on the Aluminum.