Seat ain't marred up, it's all black from the valve not sitting tight against it. Their "mechanic" called and had a talk with the service manager today. He's trying to pass the blame. But there's no way that you can throw a bolt down the front of the intake and have it skip over 7 intake holes and drop in the last one. I found the bolt in the next valve pocket forward. I'll try to get it back from the service manager and get a picture of it.