I was already working on a hardware controller for the HY-Plugins M5816 Sequencer. That was going a bit slow due to my lack of motivation with software synths.
Now that I received the REV2 last week I see a lot of potential for my controller with the REV (gated) sequencer. My controller has (when it is ready) 4 rows of 16 pots, 1 row of 16 leds (for the location) and some other potmeters for other general purposes. Really motivated to finish it now to control the gated sequencer.