I must tell you that I saw your sled during browsing before I built this mine and was impressed. It was much better than the other bunch I saw.
Bently! From What I have seen so far I am not surprised you do not have one because you do not need one.
I am very sure you can stand across the room and say “hey, you are 1/64 off”
That’s what Jim my teacher does to me all the time. When I challenge him to prove it, he take his long caliper out, measure, smile and walk away; He was right on. He also have years of experience just like you. I hope we meet one day.
Abbas, Castro Valley, CA