Front Hub - The Freewheel

After abandoning the geared hub, I elected to pursue another modern hub configuration. The freewheel or freehub would allow a rider to coast without pedaling. A different braking means is now needed but more on that later.

Amazingly, someone sells a unicycle hub with a built-in freewheel. Freewheel on a unicycle!? I don't ride them, but it sounds dangerous. Still, I bought one with the intention of using it as-is or making modifications. Roger at unicycle.uk.com suggested that the width (bearing to bearing distance) needs to be 150-200mm. The stock hub is 100mm. I believe the theory is that a narrow hub would put the spokes in a nearly vertical orientation and the lateral strength would be insufficient. Here is the hub after disassembling all bearings, the axle, and the pawls. 

It's pretty simple. Next step, how do you "stretch" this design?