Trick that I heard of on this forum, take a dremel tool with a cut-off wheel and cut some ridges along the long axis of the peg adapter, and then cut some similiar ridges on the inside of the peg housing. Think of it like redneck knurling. Once you've done this, liberally apply red loctite over the adapter, then torque the thing down and let sit for a few hours for the loctite to cure. I did these for my dually ISO pegs and stirrups, and the stirrups don't rotate on me anymore.
