I've been pinning quads for years and sometimes I still get the random one that will hurt for a week. It's just how it is. Test P can cause pip just by itself. I get more pip with tren no matter where I pin. Rotate your locations. You should be able to get 2-3 spots on each glute and 2-3 spots on each quad that you can switch around to and not hit the same spot for several weeks.