Hello So, finally I have sold Boss GT6-B, because I'm going for single pedals now. The GT6-B was my device to use both inputs of my Mesa 400+ head, because of the two outputs. So, before I bother with an ABY Box I have thought about the Boss CEB-3... The thing is, I don't need "A or B" just "A and B" and I believe, I have heard that the Boss CEB-3 in Uniboss mode, turned off can do this. This would be great, because I would also need it for that Uniboss- thing. thanks for helping..