Has anyone heard of the Mission EP-1 that states it's intended to replace the Roland EV-5, working OK with the SY-300? I'm thinking of the pedal to control the synth output level, not global volume, and perhaps lowering the guitar output a little as the synth level rises. Using another amp source or into the PA, I could just use it as a volume control. Using a single amp, the SY-300 would be switched off when not in use but was also wondering about the quality of the sound with the synth level at 0 instead of bypassed (switched off) because the signal would be going through the unit. Has anyone had experience with this?