Ya two total different machine. I love my Roadster. I just don't love the format it comes in, the combo. Frankly I just want a half stack, and I do love Mark's. If I were to try and make a swap like that I'd most likely eventually try and then swap the mark iv head for a Roadster head if I could. Ultimate goal is what I describe as my ultimate rig. Mark V & Roadster in stereo. yihaw! Although triaxis looks friggin sweet. And so does the Diezel Herbert. Maybe two stereo rigs will satisfy my GAS for a while. One day.