I'm more concerned about not noticing that the head didn't fit the counterbore
Mate, I wouldn't worry, we're all human. I wasn't even going to say which car it was, I knew it would have been an honest mistake. I was 50/50 if anyone would even be able to spot it from the pics.
Makes me think back to some mistakes that I've made, in the past - there've been a few.
The one that makes me laugh the most, was doing an oil change on a VW, I fitted the filter, poured the new stuff in... checked the dipstick.... hmmm........ nothing..
Yep, I hadn't put the sump plug back in
Thank god I realised before trying to start it
I also once took a short cut and changed a failed V6 water pump without removing the outer cover. Can be done, with the right sockets.....as has been documented on here before. Really didn't see an issue with it - but unbeknown to me, during its failure, the old pump had deposited loads of small bearings in the cambelt setup, which threw the belt two teeth a while later.
Never again - it always comes right apart for inspection now
Thankfully, I was able to recover it with no damage done, but it was a bum squeaker!