I'm having a problem I haven't seen before. I've got a Quicksilver and wanted to go from a 17-e needle to a 19-e needle. Carb works fine with the 17 put in the 19 and the slide won't drop all the way down. It seems to hang up as the needle slides into the brass guide at the bottom. Put the 17 back in no problem fit the 19 again hangs up.Brand new in the box needle from the TT store no damage to it that I can see. Anyone ever have this happen? I'm thinking of trying to polish the needle up to see if that works,but I don't know how sensitive it is.