Mine did get finished and has worked out well: https://www.cnczone.com/forums/diy-c...58176-cnc.html
I have made a number of wood projects on it including crib for my grand daughter, 3 dressers with 27 dovetailed drawers, many carving boards and more. Stiffness and accuracy are good. I have not yet gotten around to doing any metal with it though.
I am sorry to hear of Dave M. passing. He was very helpful and brought some science to offset the opinions.