So recently I bought an Esquire style partscaster. As the knobses were loose and I didn´t find the tool to thighten them, I wanted to put some new ones onto the shaft. And suddenly, the shaft fell into the cavity! So I took the control plate off and realized the threaded collar -or how would I call the "metal plate" on the top of a pot- separated itself from the pot due to the the 4 little metal ears that got loose. So put the pot back together and my multimeter tells me there´s kind of a loose connection/fluctuating number...which is strange as the pup is a Duncan and the harness is an Emerson (supposed to be quality parts)?