Aquaskiman, we look forward to your findings ;-)

jeff, of course the hub is capable of supporting new, tapped hole, there are two there already! 😄
its simply a choice of buying a new designed hub, or a full engine tear down to tap and drill a new hole. Remember to budget for a new gasket set, and of course the few hours tearing the engine down. I’ve gone with the cheap route of just shifting the existing hub and leaving out the locating pin, until I can get a Morris hub, which will be bolted on, estimated time for work +\- 15 mins.
The other solution would be a ring/clamp type sensor holder that you could move to any position. I don’t have the tools to make one.
Morris’ solution is the best option at the moment, and would be ideal if he took the slightly different cyl positions into account. I’m not sure he has, but it will still be a shedload better than 50deg timing.

P.S cyl 2 is apparently a little more advanced, which means if cyl 1 is at 50deg, then cyl 2 is supposedly at 56..... remind me which one is the most prone to failure?