I have door launchers on my car. I also have the self-dampening struts. Here are my comments after 5 months of ownership. I would not use anything other than the self-dampening struts with the launchers. I suspect that would result in too much bouncing at the top and that would seem to cause other problems we wouldn't want to experience. Yes, the trosion bar was tightened a a bit more than "normal". However, I plan to back it off a notch. I think the doors will go up just fine and it will make them easier to close. (My wife is a small woman and has difficulty getting the right leverage to close the door gracefully - that's the bad news. She points out that the good news is that I now close the door for her!) IMHO, the launchers are a very nice, cool, unobtrusive addition to the D. Dick Ryan __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com