[john walker's workshop]

you need the gauge holder or you will not have any feel for tight or loose. counterhold the screw while you tighten the nut. in other words, keep just enough counter-clockwise pressure on the screw to keep it from being turned by the nut. the adjustment is right when the gauge can be removed and inserted with a couple of twists and it does not slip in or out. if it slips (slides), it's still a hair too loose. if the gauge gets damaged, it's too tight.