I see you got the spring figured out! I haven't had my Sideshot magazine apart yet so I don't know if the screw tensions up the rotating assembly or not, but on my stock magazine it did. So I took it apart and cleaned everything of grease so it didn't attract dirt, then greased just the o-ring where everything rides on, and used low strength (purple) Loctite to set the screw tension so it turned snug but smooth. Then let the thread locker cure overnight. Prior to this the rotation tightened and loosened up the screw. I hope that this helps.