Humor?
Jim, maintenance is supposed to prevent the need for repairs. 8 plugs siezed into the heads because maintenence was ignored for waste of $36 (3 sets)in plugs is the problem here.

Jim don't encourage folks to do what you do, for most, they don't have the money time or skill to be doing major repairs instead of simple maintenance.

100k on a set of plugs is stupid on all levels.

Maintenance: change worn parts before failure.

Repair: change broken parts and everything the failure took with it.

Upgrade: go with heavy duty (or better than OE) parts or swap out known to weak parts for stronger ones before or after failure.

SD