I am very glad you mentioned about the RMS, actually the reason i ask was cause i was told one of my diagonal rods is bad length, I dont believe this is so , since i sized them while threaded through screw. but he is still probably right. I also used a spread sheet to log results for the G29 code, the best result showed a 0.3mm difference across the z-tower axis in the bed at the corners, but ok in center, like a u shape, however it is not a convex/concave error since the perpendicular axis' are ok aswell . I can post graphical later if it helps.
is there a way we can break down the D value to each RMS value, so i can tune for a size difference in the towers?