Well I just did a conversion on my 2007 Audi a4 S-line Special Edition Quattro 2.0 TDi. Balancer shaft oil pump conversion using the old 1.9 oil pump. It was a night mare. Took my about 12 hours all in all on a ramp. With 91k miles the clock the balancer shaft was fine no unusual wear. Ran into some issues as the engine was in the car. Im a mechanic so it's not too bad as I had the tools. The gear on the crank was a pain to remove. In the end I had to use a angle grinder and cut the gear as close as I could without damaging the crank and shocked the gear with a punch so it just cracked and then it was free to remove The oil pick up pipe had to be modified and the Windsge tray. To drill the block to block up the other oil feed was a pain. I had to use a 90 degree drill and then tap it out and seal it off with a bolt. Any one else done this conversion? The car seems to have a bit more torque. I still got to see how much better it is on fuel.