
That's the thing Curt,
the reason most of us use Plastigauge.
I'm no machinist and only measure to the best of my ability and tools allow, which is where this stuff comes in handy.
Like I said previously though, as long as people understand the principal of what they are measuring,

it is a handy thing to have available.
If people profess to getting anywhere near Jerry's standard of work on an old street driven StoveBolt........they need to get a different hobby!
