I actually have the Donks module in 4u. TBH its got some flaws. The vactrols ring really long, like compared to the Easel I used to have. Also the Timbre section doesn’t have the range that my Easel had. I’ve tried a bunch to calibrate it to no avail, and frankly it sounds different than the Easel, it almost distorts like a guitar pedal. Which can be cool, but it’s not the same. Also I don’t think the circuit was adjusted for Serge voltages, it doesn’t fully open with the DUSG, but it actually does with euro stuff, especially with dynamic gate output on the 0-Ctrl. But having a cross fader between the two gate channels and the stereo mixer on the other side makes up for it. If I want a little Buchla flair it’s nice, otherwise I just run it like a four channel mixer.