Anyone have experience using the boss gt-8 with a 3ch DR using the 4 cable method? If so, what kind of results have you had with it. I'm only looking to use the effects, not the amp modeling. I have about a week left of my 30 days to return it to GC. If it works reasonably well, I'll keep it as I like using the amp models for headphone bedroom practice late at night, but if its too hard (or impossible) getting it to behave, I may be better off going with a Gmajor for effects.