Any have a Potenza with Paul dropouts? Anyone else discovered the major flaw? The screw-on end caps just unscrew themselves when you try and back the tension off. You can see in the photo link. Each tensioner has two conical wheel thingies. One is drilled right through and goes on first so it can be screwed up against the dropout to stop the tensioner from loosening itself. The second conical thingie isn't drilled all the way through so screws onto the end of the tesioner, in theory you then turn this one way or t'other to adjust tension. Works fine for increasing tension but as soon as you turn anti-clockwise the thingie unscrews from the threaded tensioner rod. I'd noticed this at home before and just grabbed some pliers to turn the threaded section itself. Only occured to me today that if I ever have to back off the tensioners away form home I'm going to have to carry a small set of pliers. Bit pants really. Heavy-duty thread-lock may do the trick but it's still a daft design flaw.