I have purchased a used 3025 to replace my 3047, for weight and portability reasons. The "star" knobs, though I have re-greased the washers, are not so comfortable to turn when well-tightened, and there are some rough spots on the knob edges as well. I'm wondering how others have solved a similar issue. There is a liquid plastic dip I've seen mentioned for tool handles; there is self-fusing tape, which I am equally unfamiliar with, and perhaps firm foam padding of some kind. Any ideas?