I traded my R56 for an R52 recently and as far as I could tell they're very close. If anything, I think the spokes are rounder in cross-section on the 1st gen and somewhat flatter on the 2nd gen.
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The part sizes very similar and may physically fit. The wiring and connector appears to be different:
R53
![[IMG]](http://realoem.com/bmw/diagrams/y/w/197.png)
R56
![[IMG]](http://realoem.com/bmw/diagrams/f/t/235.png)
Obviously NewMiniStuff have worked it out. Perhaps you can offer to purchase the parts from them if they are willing to give you hints about what modifications are needed. -
BTW, if you want a steering wheel to ship to England, I upgraded mine to JCW and have an extra 3-spoke in excellent condition that I can sell for cheap. There are probably plenty of them lying around from people who got the JCW steering wheel.