I had chatgpt estimate the downtube for me and it came up with 40mmnear the head tube, and 60mm near the bb and it worked out pretty well for me (see all the frame pics above, attaching the downtube shot here).
Don't really have measurements for anything else, but they did a pretty good job with the graphics I provided (vector graphic pdf files are their preference).
Of course anyone with a frame, a piece of string and a little time could probably do better
Hope that helps!