Could also grab some fuel tubing to put over the needled nose "fingers". I also use this on my hands free soldering grasps to not chew into thin sheathing.
Maybe just a piece of paper towel around the nut to make a snug, cushy fit. And now I have to bust your balls on worrying about paint on your idler....come on man!! Gotta show us pics now, and if I don't see bikini clad women over the engine deck and under-lowerhull?..lighting.....
http://www.ebay.com/itm/ELITE-PERFOR...wAAOSwHQ9WZ1PD