Cain has very kindly sent me some photos and a sketch. He suggested that I could post them on TM if I liked as he has trouble posting photos. So here they are with the explanatory part of his email.
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Rough drawing (the attached pdf) not to scale my Moto-Lita steering boss already cut down to my size a further 20.70mm could be lost if the 3.5mm of the Mog steering shaft is removed. A further 12.5mm by removing Lifeline spacer to steering wheel but this would require the horn to be moved to the dash. But you would need to check if this interferes with your Dash.

I think I would go for something like this http://www.demon-tweeks.co.uk/motorsport...ring-wheel-boss
that does not have splines, and weld on. I believe the Mog steering shaft is from a Land Rover discovery but not 100% I would not wreck my Mog one unless I had a spare.

more photos to come


Attached Images
MOTO-LITA LIFELINE DETACHABLE SW.pdf (91.23 KB, 10 downloads)
DSCN2966.jpg (207.76 KB, 152 downloads)
My dash measurement
DSCN2952.jpg (194.26 KB, 155 downloads)
Measured from Dash
DSCN2951.jpg (166.71 KB, 155 downloads)
Measured from Column stalk pod with cowl removed
DSCN2957.jpg (175.7 KB, 151 downloads)
Bullet connector in rubber hose to contact Moto-lita push Horn
Peter

[Linked Image]