Been 3 weeks with this setup now. Took the stem and bar off my Inbred which felt perfect with 130mm Rev U-turns on.
Didn't know that about the hub, will have a look at that. Also, yes, moving the seat backwards is a good idea.
Re technique, I hear what is being said but I have ridden many many bikes in the UK and the Alps and it's just this particular one (setup) that I can't get used to. As I said above, I've used the bar and stem on my Inbred no prob at all. The upward sweep you see in the pic is a camera angle issue, they are spun back so there's not much upward sweep at the mo.
Here's a different angle taken on the same day showing sweep more accurately