I am ready to attaach the axels to my 930 Porsche transaxel and Corvette uprights. I am interested in the benefits/strenghts/ weakness of the CVs vs. U joints. I plan to see track time occasionaly, and I will have plenty of power so it is important to not have to do this more than once if possible. I know that the 108mm Lobros(?) are superior to the 100mm. from an earlier thread by Rick Merz. What experience have you guys had with these units on the track? Hassel factor? I have several contacts for either method. Will have to send the uprights off to have the U joints removed if the CVs are utilized.