Cheres Sewen, it's just arrived so I'm kind of commited now, I guess I've got a 50% chance of spline count success
What I have discovered is, to ensure the pull release knobs sit symetrically behind the wheel's horizontal spokes, the three locating pins on the column end of the Optimill hub will need to be set with respect given to the steering wheel holes, this because the 3 locating pins form a triangle so there are three ways it can be clocked.
The removable element of the hub screwed to the wheel and the fixed part of the hub that remains bolted to the steering column must connect in the one position that leaves the release knobs in the horizontal plane, and obviously all this is also set with the road wheels in the perfect straight ahead position. Here's a first dry fit off the car using my old 14" thin rim and flat Moto Lita wheel, and yes, initially I did offer it up back to front
In the video you can see how getting the three locating pins in the wrong orientation will leave the steering wheel bolt holes missaligned.
