After hearing a report from teek42 of an unbarreled RS not shooting wildly every which way, I went ahead with shortening the former stock motor test gun to a pistol.
This is the shortest possible configuration. All battery box remnants are gone. The carry handle was retained, as I do not like the loss of aim reference that occurs when it is removed (leaving a non-flat receiver surface if you cut in the obvious locations). Plus, I like carry handles.
2s pack on the side gets the job done. Still to do: reroute those battery leads which were left from the last front-wired configuration, and bodywork of course. Then paint? I am also going to be putting carbons in these motors and swapping in a better set of flies when I get the chance.
There were/are plans to add a N-Strike stock mount and a stub barrel with twist-lock muzzle fitting for modularity. That is going to need to be balanced with minimum length and bulk. I could easily go as modular as a Stryfe - a full-auto Stryfe... but then again, regular old rifle RS with fixed barrels and receiver-integral handguards/barrel supports do that better. I may just keep it as is, being that this is definitively a quick and dirty type of weapon, is never going to be anything proper and formal and clean, and it is SHOCKINGLY short in its current configuration.