Well John brought me his first blown 500i the other day, kinda odd was the newest all stock one without even a muffler mod. I have a low hour one that got the handle tore off from the boom truck when he swung the basket so I have a good top end but will need to figure out why it cooked. Holds vacuum and pressure now as is with cooked cylinder so doubt it was an air leak. Guess I’m leaving towards a brain fart on the computers part but haven’t hooked it up yet. Figure I’ll swap top ends vacuum and pressure test again then hook to my mdg1 to do a recalibration. I heard some went down before and after a rebuild and reset they were fine. I’ll also muffler mod to get the heat out, this is the only one that isn’t. His very first one from Greece is still going, need to scan that one sometime again. As of last when it got a new rewind it had over 15,000 pulls on it.