Zoom G2 dual pedal mod

The Zoom G2 has a stereo input with a dual purpose. Plug a footswitch with a mono cable into it, and it serves as a footswitch, or plug an expression pedal with stereo cable into it and it serves as an expression pedal.

The patch presets allow for the use of pedal in one preset, then expression pedal in another, so what I'd like to do is somehow combine the 2 cables so that I can use either pedal without physically swapping them over.

Has anyone tried this before, or can give any pointers as to where to start?

Would it be as simple as soldering the core of the mono to the tip of the stereo plug?

I doubt you could use them simultaneously - you could easily switch between them however. You could just use a stereo A-B-Y box. Simple as that. Plug your expression pedal into A, plug your footswitch with mono cable into B, then use a stereo cable to go from the output into the G2.

In order to use the pedal you would select A on the A-B-Y box; in order to use the footswitch you would select B on the A-B-Y box.

Thanks. I'll give that a try.