BC and UW skills

[ManiusTerentiusPullus]

A few years ago BCs with frames + saddle and BC with handles seemed somewhat popular.

Impossible wheel with frame and seat, does it exist?

So lately I’ve been thinking about getting myself an ultimate wheel or even an impossible wheel. In theory the ultimate wheel is just a uni without the frame, but the impossible wheel is different. It’s easy to make one from a BMX front wheel, but what if you would convert an existing uni to an impossible wheel with frame? This would allow for much better control (you could even mount a brake). Does it exist already? It should be fairly simple to make one either by mounting pegs (bmx) on the…