Looks very nice and neat .I didnt know you are so busy with things . (Thank you for your support).
I was working a lot with max/msp and m4l too. Its a lot of fun , but it takes a lot of time as well :) .
Enjoy and keep up this amazing work.
could be... you can try to filter out some psu-spikes by soldering a 100nf (maybe add also a 1uF or higher for too more stabilize the psu as addition) cap between + and - on the potis legs (most off the time these are the outer 2 legs off the trio)
look into ng documentation if there can be set a offset for the middle position so it stays on a position... because pots directly to the core is always a bit random... better use for example: http://www.ucapps.de/mbhp_ainser8.html
then you have less random values
also check the quality off PSU...off course a faulty pot can be the reason too