The string clamp design of the EHB is excellent, having a non-rotating metal dowel clamping upwards from below. I was hoping they would use that design for their headless guitar, disappointing. A rotating grub screw has multiple problems used as a string clamp. That is not a problem, the fret slant has been added to the bridge positioning intonation slant. Would have been an extremely careless design mistake to not do that =) To see this, open up 2 browser tabs with the Q52 and QX52 and switch between the tabs. The guitars will be aligned on your monitor. Look at the bridge slant change. I agree in the case of fanned frets. But for headless guitars there does not need to be a scientific study, it is obvious that a guitar with improved balance is less stressful for the body in multiple ways.