Just one more thought along the conversations of the output jacks (if you are open for input - its otherwise fine, as-is)... I think everyone has "just one thing" that would make it even more ideal for them - myself included. My one thing would be a volume control in place of one of the output jacks and the remaining jack would be stereo so that a pair of headphones could be used. Its easy enough for me to use an adapter to separate the signals if going to an outboard interface or mixer. In fact, I'd most likely need to use a 1/4" adapter for that purpose anyway. Making the module compatible with headphones would make this thing a must have for small, portable rigs. Of course, I would take the small <4hp form factor over additional bells and whistles any day.
Either way, well done and I will most likely want one even in its current iteration.