I found some cases online where techs bailed on doing this mod cause it was to complicated, so possibly not as straight forward as with most amps. I’m no tech…but in my mind there’s always 1 signal going into powersection…that’s the one you need to hijack for a loop ;-)
anyway…mine came with the mod done…so no first hand experience here.
The drive channel is probably my fav overdrive sound..super responsive.
Drew a nice profile from it used on this tune: