I suspect that the 6ve1's crank is not strong enough to survive after substantial regrinding. It looks like my broken engine's crank had been ground and replaced with new bearings and pistons. If the crank was already at tolerance, grinding off metal at the journals will only weaken it. Nearly all engine remanufacturing shops regrind their cranks and most of the engines they start with have spun a bearing or something similar, forcing more than minimal grinding.

I really, really hope that yours does not suffer the same fate as mine. At least if it is a broken crank, it should be nearly impossible for them to blame it on anyone but themselves. Even the worst installer would have a hard time causing that catastrophic of a failure. At least I keep telling myself that