VHT D50 : stock amp vs modded amp

I took this video to show the differences between a stock VHT D50 and a modded one, into which a few components have been changed. Settings are the same on both amps, reverb in the loop for both of them. Cab is a Two Rock 2x12 with G12-65s Heritage. From 3:16, the cab is Palmer 1x12 with a WGS ET65, I was trying to show the sustain and slight feedback apparent in the modded version (works better with my ES335 for that).