Congratulations! What a sigh of relief. I know you're glad to get that behind you.

I am now going home to check the head bolt tap that I bought to make sure it is a M12x1.75. I used a 1/4" drive ratchet as a tap handle and plenty of oil when I chased my threads. Some of them were kinda tough during the chasing but no metal shavings came out.

How did you make enough access for the drill motor to clear to get at the rear-most head bolts? Just by removing the plastic stuff - that was enough?