I was gonna make a clamp for the flanges anyhow, so I can put the axle on, then unclamp and rotate the flanges then reclamp to see whats occuring, what I might end up doing then is setting everthing in place and then reducing the diff nose angle as far as poss but tradeoff diff nose to diff trackrod clearance.
I have a series steering damper anyways, I think the disco ones are prone to being stuffed by objects on the ground.
If it can be done thats interesting, and I might well put the diff as per the series yet, I havent made my mind up whether to fit a disco/deffy box yet or not, if I do then the diff will be as per series, at least I know you've done it and it works.
The note about prop phasing, not sure about that, summat I dont know that well, even though the props not driving its still turning, so there may be a risk of vibration, allthough that would be removed with free wheel hubs.