I'm surprised not to have seen it anywhere yet, but maybe I missed it. Check out the HBE Hematoma. It's got a boost function as well, which can help make the OD dirtier, which is cool. EQ switch to give you a brighter, distortion type of tone or a warm overdrive. It retains the bass really well!! I highly recommend checking it out if the Microtubes ends up costing too much. It's everyone's dream, and when it costs too much, people seem to go for the Hematoma if they know about it.