Gradually finding time to tweak the rig, with my previous guitar/synth thing, I was sub-mixing into two channels right out of the hex input, so it's nice to have the full hex path, but also a new challenge. The GK input allows me to use the guitar MIDI volume to control overall VCA level, which is nice. I am using a Roland GP-10 into the Polyend Poly for some triggers and pitch - in this case the MIDI pitch is controlling filter frequency, and the Envelopes are driving the Resonance of the filters. The Vo is setup to mute the strings for more of this, with a little sustain at the end. I really like the Vo mute, it gives a somewhat banjo-like feel.