With a guitar rig? Why not take the stereo tap off the last pedal in line from your pedal board?
dB
The Zoom G5 guitar FX pedal does have stereo outs which I am utilizing. So far I can only create a stereo field (audio from the side speaker of the SS v3) using a stereo delay, stereo reverb, stereo chorus or auto pan fx.
I'm wondering if some keyboardists with mono synth sounds might have some suggestions for enhancing the stereo field.