Should I have the Timefactor set to line level or instrument level in the fx loop for Bogner XTC? I know this loop works at +4dB instead of -10dB. Strange thing is….it only clips when I am using piezo pickups??? All other single coil and humbuckers, no prob….Timefactor sounds great and clean. And piezo work brilliantly on other amps with timefactor???? What is special about this loop and what am I missing? Also, if I change both in and out to either line or instrument level….no difference….same problem with the bogner? I don't use the piezo that much but would like to figure out this puzzle? Advice appreciated?