[Tinker]

Looks like you have it covered. I would just add since the type of driving you do a lightened flywheel is not what you want aluminum or 30-35lb flywheel. surfaced is fine. If your crank is out of line then a dial indictator would show it. If the previous surfacing was out of level that would be evident. So many factors to concider but should be taken up by the clutch disc and plate. Unless its really out of wack. Seems like it was out far beyound a few thousands, if not a few hundreds. Some thing to concider is your driving habits, like riding the clutch.

All and all its just my thoughts.