I have been working on 02 4-Tec rebuild since last winter. Rebuild went very smoothly. I decided to purchase everything I needed in the winter and didn't get around to the alignment until some time later. After experiencing a lot of drive line noise, I did some searches and found a case where someone here had checked the run-out on one, and found it to be out of the seadoo specification (not sure what that is). I called SBT and was told that I was outta luck because too much time had past since I purchased the alignment device. It had 0.050" run-out. I have meticulously taken care of the shaft so I know it was shipped out of specification from SBT. I am past being upset about a defective alignment rod now. I just wanted to warn people that are purchasing to check the run-out immediately when you receive the alignment shaft. There ARE problems with the tolerances of the device SBT sells.