Er..... I wouldnt put lube or anything resembling oil near anything that has pressurized air.mike from tech pb put some lube on the threads that seemed to stop the wearing
I ran HP on my mini for a year before I realised I had an HP system on a LP gun. It works perfect, and there was no wear on my threads. Just clean the threads regularly and you wont have problems.
I currently use the SP on/off, works a treat, and moves the bottle away from your wrist (stops you having the camp wrist thing). You should all get away from thinking you need a "tight" or "compact" setup, and move to having a comfortable setup that gives you a decent shooting platform. Bending your wrist around a bottle is not the way forward