Well I guess you could use the hand mic, but it’s a coiled cord which I think it would translate into having one hand with the mic at all times or otherwise device something that holds the mic nearby because if you let go of it, since the cord would be stretched, it would spring back and most likely hitting the FO with it
Even if you sort of get the mic out from the FO side behind their seat so the cable isn’t in the way (which is another issue with this), the coiled cord I think would be an issue if you can’t think of a way of holding it near you.
i like the idea though, of having the two CMs in the loop