Hello Ted :) I have looked all over the internet for documentation about a problem it was discussed in the Autodesk Forum you mentioned, and nothing was able to help me fix the situation I am in... I am not an animator, i just do modeling, but in my situation i have to animate... It seems you are very experienced, and you maybe could help me in my problem. I posted a question in Turbosquid forum area, here is the link http://www.turbosquid.com/Forum/Index.cfm/stgAct/PostList/intThreadID/26739 It is about a camshaft animation, that i just can't figure it out! i have tried tenths of methods, but still nothing! Please help me! it's more my license project at my University, and i am stuck for one month in this dilemma, and i can't get any progress if i do not complete the animation. A lot of people tried to solve this problem, but no one succeeded, pleas help me, I would really really really be in your debt :) Eddie