Yep, that's the post I followed and the u joint was smooth as silk. So I'm guessing the marks are a little off or the rust has caused another catch with the vibration I'm having now. Probably just going to replace it eventually so I can move on to other areas of the car. No place around where I live can even balance the two piece. Have any of you replaced the driveshaft and where to you purchase it? Thanks for all the advice