Well, it happened again, this time at 750 miles. I was entering I70 accellerating to enter. Rpms 3000 speed 60mph on a downhill ramp and the "Engine operating at reduced power" came on again. The entrance ramp connects with the ramp to return almost directly to the dealership here in KC. When I pulled in I left engine running and showed service mgr. We shut it off and restarted it. It sounded normal. BMW says to drop exhaust to check wastegate. That does nothing to replicate prob. My suggestion is to put another computer in it and see if it does it in another 3-600 miles. If it does we remove ALL BMW mods and go with stock or a Dinan mod later. Otherwise Germany will be getting a 3500 lb enema. Sorry but when you spend this kind of money, you don't want to be a guinea pig.