Oh, no kidding, I never even thought of that, so what you are say is this, if I have a four groove belt pulley I can use a 3 groove belt on it, just not use the last groove, I do think that's a little silly but it sure would save a guy from buying himself a new pulley now wouldn't it, I would have thought that the sides would keep it contained but if the rib is down in the groove then how could it go anywhere,,,I'm so happy you mentioned this..This is great information.. Dan, Macbeaver is feeling a little Macstupid right now ha ha ...Maybe I really am a silly rabbit... :smilie_happy: :music: :builder: Now then, Mr. MacBeaver has thought of a way to make a adjustment for in or out on the alignment, I find this mod. to be most helpful because man it's lined up good..Joe said it was good. :clapping: .But Joe said... :clapping: :clapping: :Egyptian: No I'm not drinking Koolaid