I've started to work in KiCad and love to use the buzzard library for labels now. The 16 step sequencer is basically two zynthias (CD4028, CD4029, CD4051) that either count to 8 together or to 16 one after the other. The two stages had to be mixed with an LM358. I tried a TL072 before, but that didn't seem to work. Maybe the LM358 likes DC better as I did not supply negative 12V to the board. I'm using a CD4070 XOR logic gate to be able to invert the second stage with a switch. Still have to route 48 air wires, but I'm getting there. This is a revision, I had the first board for 8 months and was only yesterday able to fi the mixing part of the two stages.

https://github.com/davedarko/Zynthia16