okay, just so im getting this right, you basically are letting the bolt do all the work (sinking the t-nut teeth into the boot) by tightening the screw? i think this is a great alternative to copper Cut those teeth off the t-nuts at their base. You don't want to be trying to drive those into the insole. The would stick out the bottom of some soles just by their length, and they can fracture the outsole. The sharp edges from cutting them off is plenty of grip. Yup, you have to cut them off, or bend them off... the only reason i was using the screw to do the work was the hole i drilled was just the right size. My hands dont have the dexterity to force the tnuts into the holes, so I used teh screw to help me pull the tnuts into the holes. perfect-thanks sprungster and fatwabbit