Don't feel too bad. I once did worse on a twin cam Mitsubishi. The thing was making a gawd awful screetching noise from underneath the car. I took the tranny inspection cover off to see what I could see and found there was a bolt trapped in one of the recesses on the flywheel and it was grinding up against the tranny housing. I was totally excstatic that I'd found the source of hte problem after all this time. I took the top cover off and rotated the engine by turning the cam to ge the bolt out. Once removed, I popped into the car and cranked it over (forgetting of course that the box end wrench that I'd used to turn the cam was still on there)... This car and motor hated me... it was a fresh rebuild I'd just put in there and now the head, valves, and one of the pistons were FUBAR. This was just the latest in a long series of events with this particular motor.
Anyway... don't feel bad. Stuff like this reminds us to slow down and take our time.
Anyway... don't feel bad. Stuff like this reminds us to slow down and take our time.