Re: Best Quality Volume Pot?
I think in the past 60 years of playing and 2 dozen years or guitar repairing and building, I only had one (1) pot do what you describe. And that was due to my early soldering dis-ability and underpowered iron. Certainly playing around with the lug, bending it, twisting it, rotating it back and forth will break the internal electrical connection to the lug.
If you heat the lug for too long it can damage it. That is one reason why it is good to have a higher wattage iron. Get it hot, solder on the wire, and get off quickly! If your iron isn't hot enough, you have to keep it in contact longer to melt the solder and you will have a tendency to add lots more solder to the joint in attempt to make up for the poor solder joint. Not good. VERY BAD in fact!
I have used just about every brand of pot out there...CTS, DMZ, Bournes, older and newer Alphas, full sized, and small diameter, etc. All of them have been good quality and have functioned well for many, many years. They each have a different feel to them, so just pick which one you want and don't worry about it breaking. Just worry about YOU breaking it.