Scott
if you want to use Eclipse in mono without a mixer, you'd need to reprogram presets and have all voices panned to the single output you will be using. Some fx like reverb won't pe panned to mono anyway. Tha's the reason why I advice(d) to always use a mixer anyway as you won't need to reprogram things and the mixer pans will easily do the trick for you. Returning one side needs reprogramming. Returning both sides and using a mixer will make the trick.
best
I
