+1 on rum runner. I rode one for a while and wowza, such a snappy sick ride (without being too twitchy).
You did have to get up to speed to do anything that can be considered maneuvering with it though. When you were going slow all it wanted to do was stay stiff and try to take you off balance. I compensated for this at low speed by re-adjusting myself by sliding sideways or hopping/lifting the rear wheel and jutting out sideways. I mean, anything more than 13 mph on it though and you were on rails.
Sadly, I ended up snapping the frame on the chainstay. It still lasted for a solid 7+ years in many different cities. Ahhh... good times on that bike.
If they simply welded a cross bar across the chainstays (seems to be standard on cx bikes because they probably experience a lot of stress in that area) though i'm sure it would have lasted much longer.
Altthough I don't think that that's possible without compromising the paper thin tire clearance that this thing was capable of having (wheels were basically like less than 1ft. apart), and making a wishbone would probably be asking too much at this price point, and it would deter the majority of riders because it's weird.
Having a 27.2 seatpost ,1 1/8" headset, and a standard euro bb also gives you loads of options should you choose to change things around.
Keep in mind that i'm a clyde (was less of one back then), and I was a little rougher on it than usual, so ymmv.

It was a very solid fun ride while I had it. Would definitely buy another, but if I biuld something that I want rather than buy something out of necessity I think that i'm going to build up a FBM sword next.