[arm-allstar] Is there a way to use both L & R channels, on a modded fob?

[kd4ont]

I'm wanting to build a hybrid node, half radioless, half rf. In most of Peter's videos, his kits, that have a setup kinda similar to what I want to do, have two fobs and nodes in one box for both rf and dtmf mic. 
I haven't gotten to the experience and experimentation level yet to determine if both channels of one fob can be used simultaneously. Some may wonder why anyone might want to do this, but I have my odd reasons for my project. This would enable two ops to use one node simultaneously and the audio would mix. Kill two birds with one stone and use less hardware, setup, and linking two nodes together. 
I sometimes think out of the box and try to see if hardware can do things a little different than it would be normally used. I know this feature would not be wanted by most node owners, but I'm trying to push the limits by introducing new ideas. 
I understand that there will will be needed more level adjustments to the circuit, one for rf, one for mic, before it needs fine tuning with usb tune.