[next step]

Originally Posted by scott v
mxr blue box (capacitor modded w/ switch to alternate from original sound to new, this used to be in my effects chain until i realized this mod totally altered w/ the sustain ability of my guitar tone in a negative way, it sucked all the sustain, probably there is something else inherently wrong w/ my copy).

it's not your copy, bluebox shears some freq and affects the sustain, especially if you made the cap.mod.