I have been a part of a team at the University of Rochester that has created a device that has the ability to be attached to a recumbent tricycle (currently SunCycles EZ classic) and incorporate full braking, shifting of all 21 gears and precise steering into a single handlebar. This bar like mentioned earlier would be bought separate to the tricycle and attached. Upon attachment, the device could be switched from dual arm use to single arm use. Perfect for programs that suit both types of use and easily assembled by an individual with one arm for home use. Any information on this topic would be helpful, and be sure to check out our launch on #Innovocracy. Thank you!