One other thing [MENTION=88363]Jack.tr[/MENTION] and I should have mentioned this too already....Im sorry, its kinda been a day lol. On the crown tube threads....lots of times mine feel gritty for lack of a better phrase. A trick Ive used is waxed dental floss. Take a piece and unscrew the crown, then when you pull it out to the last position, wrap the floss around the threads on the tube where the crown screws down. A few good rubs usually helps. Also...I have taken a toothpic and a tiny, tiny amount of vasoline on the tip and placed the tiny amount on the threads, screw the crown down and wipe away any access.....it really worked well on some of mine that felt gritty. Just dont use too ,much and get it into the tube lol. You will see what I mean when you try it, just takes a small amount.