I really think that it's impossible to weld/burn a stock clutch to the flywheel. It'd explode before it became permanently attached. He'd smell burning clutch only during (and shortly after) frying it. The next morning, it would smell fine. I burned the crap out of my WRX clutch way back. It worked fine, it just stunk for the next 20 minutes. 30 minutes later, you'd never know.