

"The knobs and sliders on the mod panel is the Dynamic Unison, Dimension C and Phase Shifter controls.
The Dynamic Unison is a auto switching mono to poly controller using the old on/off, chorus and tremolo buttons.
Then there is a Dimension C chorus/ensemble like the Boss CE1. These use the four silver buttons for the different fx amounts. And the on off is the old wha button.
The Phase Shifter is a four, eight and twelve stage unit with stepping and rise only and fall only.
Other mods on it include midi in ,through and out. Yes that's right midi out :)"
I asked, and yes, it does transmit poly-aftertouch.
Update via nkdent in the comments: "Well the Dimension C has those tiny silver buttons and is much more compact so I'd say he probably mounted the board for one inside. The history is that the Dimension D came first and the C is a budget but still guitar pedal version that's analog and comes pretty darn close. A big difference is the D has stereo or mono balanced ins and stereo outs. The C has only a mono in and a choice of mono or stereo outs and is unbalanced with a much tighter packed circuit board that's a fraction of the size of the D.
The settings are pretty similar (there is no variable speed on either, just presets of increasing intensity) though at least one is more different than the other 3 if you compare the 2."