The spindle on my PC feels loose. With a BP on it I can wiggle it about 1/4 to 1/3 of an inch if measured at the edges of a 5" BP. Is this normal? I took the BP and counterwieghts off last night to see if there was something to tighten with conventional tools, but saw nothing. I tried briefly to remove black plastic from the outside, but stopped for fear of breaking it. I don't remember if it did this new or not, and it doesn't seem to be getting worse, but the last thing I want is for it to come apart on some car I'm detailing. Does yours do this?