It appears that two things keep it from our use. The clutch is a 54mm. The lack of a sealed compartment for the gears means extraordinary maintainance in cleaning and lubing the gears.
Another note. The output is clockwise meaning it would be mounted on the right side, where we already have mutiple gear choices. Staton makes some clockwise output gearboxes that could be used for a more direct "shifter bike" system.