Thanks GDOG,I suggest you lightly lube the thread on both caps and just snug them down lightly when screwing them on as the nylon tends to swell and before you know what happened you are unscrewing your paint savers out of the tank. It had already happened to both sides of my tank.
Or replace the caps with an aftermarket replacement!
G
I try not to snug em down too much as it is because the stock caps are tough to get off already. What are you lubing the threads with?