Engine decking issue(help)

yellow rose said
Right, squaring the deck is squaring the deck.

I mentioned CNC because that's where everything is moving. CNC isn't better. It will just repeat. Over and over and over. It doesn't know if it's right or wrong.

I've used a machine like the Rottler. And I've used machines far less than that, and got the job done. If you need a certain machine to do a quality job, that's on you.
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Yep, it's the set up that matters. Seen plenty of "junk" spit out of fancy CNC machines.

A good machinist with a storm vulcan can absolutely match decking results from a rottler. CNC doesn't guarantee satisfactory or good results.