thing is you'll get some guys that say they build engines all the time without cleaning or measuring anything and do fine.
What they don't say is how many failures, what kinds of failure, what they've done to prevent failure, i.e. just because you build 100 engines and 78 of them survive doesn't mean the other 22 of them failed for reasons outside of their control. But that's how machine shops and builders often think "it wasn't the machine shops fault... prove it"
tell you what if you aren't getting a list of exact dimensions, sizes, specs, measurements, surface finish quality, weight, balance, and so forth back from an engine 'care' giver with every dollar spent then you have no idea what the $(@*#%$ is going on, what was done, or even what oil to use.
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