Thanks for the help ChromeTiger. As you described what you meant i've tryed how this would look, but wasn't happy with this methode. It lost with this the dynamic of a sportscar. So i decided to make the bar much stronger and forced my brain to find a solution to swing the doors up with no muscle-power. Then i got the idea. Into the inner door is a spring (red) and cylinder in the disk. So when the doors where pushed outside the spring and cylinder will moved it automatically upwards. The disk is designed the way that there is a automatic stop about the inserted angles. Uhhh, don't know if what i described can be understand. But anyway, this will technically work. Now i've just to convert the whole thing to meshs, assign materials and groups and do the CR2. Think i can finish everything to Thursday. ChromeTiger, if you wants i'll send you a copy to test. Just send me a mail to: sharkey@cybergate-corp.ch SHARKEY