Thank you ata.
To be more clear after some thought:
I was in know way impugning David's ability nor integrity.
Dimensions on a site do not particularly reflect the true dimensions.
David could have posted those dimensions as accurate for a layman.
They may indeed be accurate W/I +- .0005, he seems the type.
Just as an add on-- Nothing to do with David here: cnc machinery is not necessarily more accurate per se than manual machinery. That's a function of numerous variables such as programming, tooling, and the human element. As a general statement it's certainly true that cnc is more accurate for higher volume runs with all variables at their highest potential capabilities.
I'm sure David does a final inspection to stringent tolerances for all his products . My question was geared towards the terms of the site dimensions.