Cam eccentric on 340

The guy was really good keeping me informed doing the refresh -- he did rings, mains, new cam -- and I know he felt terrible, like an idiot, for making that mistake. I like and trust the guy. They've been around since 1965. Probably 5-6 guys work there. I have no problem giving him another chance. That's what this country is all about, right?


Is it possible he let a new guy or someone with less experience put it together? Like I said...**** happens.