Update 2016-12-20: Updated the info for the 2.5 version
Here's a minor update for the Arcadiator.
Improved schmitt trigger
Fixed clean blend mod
Read more about the mods in the build document.
The Modboard Also released is this small LFO trianglewave daughterboard.
It can be connected together with the Arcadiator to modulate the pulse width for even more C64'ish sounds... Many Parasit Studio boards will have Modboard connections in future revisions that will allow for new crazy sounds.
The modboard can be used to modulate just about any pot in any circuit that is set up as a variable resistor. You just have to experiment with the type of vactrol (or LED+LDR) to find the one to best suit your purpose.