I have plots of many Bill Fitzmaurice builds, a few Fenders, Peaveys, Avatar, D410-XLT, and a Magnum 18LF.
The many charts I've made with TrueRTA run the high risk of being wrong, SPL-wise. That is why I cut the SPL numbers off when I publish a few of them.
I found a fatal bug in the data import function of TrueRTA, plus an annoying bug in the calibration/meter setup, and today found yet another fatal bug in the resolution transposition. This one gives totally inaccurate results in the lower resolutions, such as 1/3 octave, 1/6 octave when transposing down from 1/24th which is the measurement default.
The first two bug reports are in with John Murphy who is the author of TrueRTA. I have not reported the third one yet, as he tends to go into denial mode unless the proof is iron clad.
If anybody in the Sacramento area is interested in getting measured, all they have to do is contact me, and show up with their cab.