I just received my clean/dirty w/master bypass looper pedal this morning from loop-masters.com. You guys should check it out. It is a very handy pedal to have. Mine is a 2 loop switcher with an In and Out jack as well. Right now I have a FD2 and Zendrive in loop 1 for rhythm/lead tones, then I'm using loop 2 as a tuner out switch. So I have my TU2 plugged in there. It is also nice because I can also turn the tuner off and then it has a clean signal. Also, as of now I am using the master bypass switch as my clean channel. I am also able to put my DL4, MXR CC, and Katana before and after the switcher, therefore allowing them to be on for any loop. In terms of tone, my tone has become more transparent, and it also helped my od pedals shine a little more. Now my different tones are a little more punchy. Check their site out because they make anything you want.

