No, I use the lug between the screw and the threaded brass rod (as designed). The nut is tight against the lug, which is tight against the delrin insulator. If I want to adjust the screw in the threaded delrin, I loosen the nut first, adjust the screw, then re-tighten the nut. I always keep the delrin insulator tight against the body of the 510.That's what I said in my original post. But i also mentioned that you need another nut to catch the lug since one nut will not be able to keep it tight on the screw. Rossum are you running your positive with a wire as well or wireless?
To be honest though, I basically never adjust it once I get it set up, 'cause I very rarely change atties.