I'm about to buy a T-rex Dr swamp and the seller told me it was'nt true bypass.(he took of the battery and the guitar signal was passing trough, he sais that was the way to really know). So since my Trex Replica suck tone a little off my Fender strat plug in my fender dluxe and my Tube screamer was'nt...I,m starting to think that tone suck is out of my knowledge. Can someone light me up on this one???