If you're using a Micro Line Mixer without a switcher, you'll need something to split the signal from the buffer to go to the pedal inputs. A Y cable is sufficient to split to two pedals, but what if you have 3? I found this box that seems like it would do the job:
I have one on the way to test, but it seems like it should do the job - it's a pretty simple thing. I'll post my findings when I have a chance to try it.

I have one on the way to test, but it seems like it should do the job - it's a pretty simple thing. I'll post my findings when I have a chance to try it.