rollagain

Not sure how bad this topic is drifting, but I thought of another tangent today. It may be the first original idea I've ever had, but more likely not--not original, that is. Split this off into another thread if you want.

Here goes. Start with a penny-farthing. Replace the front wheel with a man-driven monowheel such as the OP wants to build. Construct a steering fork to join the monowheel to the penny frame. Equip the penny rider's position with an additional pedal drive for the monowheel (that's the really tricky part).

Three-way hybrid penny-tandem-monowheel. Stoker below, captain up top.
Keep in mind that the steering fork needn't look like a bicycle steering fork; it can attach to the mono frame rather unobtrusively. Mono can be detached and ridden solo, or the combination can be ridden solo as a penny.

I'd love it if somebody here would sketch this up; I don't have the resources.