Physical down tuning + modeling = problems! in James Tyler Variax Guitars / Workbench HD Posted March 17, 2016 You realize that won't work at all because it's the ACTUAL PIEZOS that is your main issue, so just changing guts isn't going to change how responsive the piezos are to your tunings... Either way, physically retuning a Variax is not really something you can rely on. Upping the gauges of your string to make up for lack of tension might help a bit, but ultimately the piezos are designed for E standard. Without that tension, the strings don't contact with the piezos good enough. I have been playing my V300 and V500 physically tuned to D for many MANY years And never had any problems. True, I use a slightly heavier than average set of strings - 11-52 Dean Markley Misfits set with a .010 swapped in for the .011. The problem began when I brought home my new JTV. When tuned to D is not warbling, it is randomly generating notes I am not playing, mostly on the D string. I have zero fret buzz and the problem only occurs on the 12 string models as I recall (haven't dealt with it for a couple of years). I understand your experience is different. This might be due to the resononce of the springs in your V600s trem - my V300 and V500 had hardtails and my transplants have Bigsbys with the strings damped at the trem. My point being, in my tests the JTV guts behave differently than those of the Gen 1 Vax.