I bought it used but I'm pretty sure it came from ebay. I used it for about 15min before I decided I was done with it... not exactly what I expected. I'll have to take a closer look at the barge blenders, but I'm pretty sure this pedal operates differently... I got to impression it was wired wrong or something, but either way I didn't find it useful personally.
With only one effect engaged(middle switch + one of the side switches engaged), the knob on the corresponding side controls the blend, from dry to 50/50 - There's no way to run a single effect 100% wet.
With both effects engaged, the volume knobs control the volume of the 50/50 blend on each side - So at full volume, you have a 50% dry and 25% of each of the effects. As you turn down, the blended signal is turned down- not the amount of wet into dry- just the output of the 50/50blended signal.
Thank you. Check out this graphic regarding operation modes:
I'd be interested to hear your review if you have some time to play with it more.
D.