ORIGINAL: riot3d
The sand paper works the best, you don't need to glue it to the backplate.
I use a Craftsman 1/2'' socket wrench & hold the very top end of the wrench when tightening. If you use a double jam nut, you can tighten the first one fairly tight but not the second one. I never have one come loose except when running too lean & back fired.
Adrian
I agree with Adrian on the sand paper; it works fine and if you do it the way I do it, it works with chewed up drive washers too. The way I prepare the sand paper disc is to use the sticky back type and glue two pieces back to back.....sandpaper is exposed on both sides. One side against the drive washer and the other against the spinner back plate. I've also done this with regular sandpaper without the sticky back, and simply ca'd the two paper discs together. FWIW 2U