This drone uses all of my BugBrand modules.  I took pulse outputs from the two SYN2A VCOs and mixed them in two of the Logic Gates (one OR, one XOR), then each of those through an LPG and into the two inputs of the SYN2BX Frequency Shifter.  There’s a signal path through the PT Delay, as well.  The only non-BugBrand module used is the Buchla Dual 281 Function Gate, which provided envelopes to CV the LPGs.  I mixed in real time during recording.