Two Madbean Cave Dwellers, a "mid-fi" echo box. I built one stock, and one where I attempted to get a more natural sound out of the dry signal. The stock version darkens your overall tone, and me, well, I likes my treble. I also changed the law of the Dwell pot to move the oscillation to later in the knob and smooth out the number of repeats you get in the center of the control. It works great now, but I would like to do a little more experimentation with the overall tone values.
Thanks to the forumites at the Madbean forum who suggested the values to experiment with for the tonal changes.