Thanks again, folks. I'm working hard to assimilate all of the info being provided.
Apologies, I missed the "Expand" arrow on Dann's post of two days' ago. Having found it. I'm more up to speed. Thanks, Daan, for your comprehensive set of responses.
My reason for building up replacement axles rather than rebuild the existing ones is to minimise downtime. The current axles on my "90" are working perfectly. Both swivels could do with replacing, particularly the right side one which is leaking slightly, but they're serviceable and I can use the vehicle. If I rebuild the existing axles, I'll be without my "90" for some time.
Yes, I could do some intensive work one axle at a time with the axles on the vehicle, but that won't give the result that I want.
My overall plan is to do a good job in a number of areas on the "do it right, do it well, do it once" principal. Thus I can create a custom "90" which will meet my needs till I'm too old and decrepit to use it!
Other items on the list in addition to axles are a hydraulic winch, a hydraulic system to run it and my log splitter, a compressed air system to run the Ashlockers and other things such as timber treatment sprayers, tyre inflation, etc., a roll cage, and some peripherals such as work lights. For the air system, I intend to adapt an air-con compressor to be an air pump.
As far as the axles go, I have the "scrapper" axles, so I can work on them "on the bench" (clean, de-rust, build) and when they're ready, swap them with those currently on the vehicle.
So, summarising to date, I have my shiny new diffs with Ashlockers, courtesy of Xcess4x4 and I have the axles tubes. I plan to buy Ashcroft half-shafts and drive flanges. Suggestions on this thread suggest Ashcroft CV joints are the best way to go, therefore I'll bite the bullet. Otherwise I'd need different hubs to use early 23 spline LR CVs and anyway they're on back order. Again, suggestions on this thread strongly suggest Land Rover swivels, so again, I'll bite the bullet and order some. I'll probably go for Britpart stub axles partly because there isn't significant negative feedback on here, and partly because I'm inclined to the view that compared to swivels, there's less likelihood of the manufacturing going wrong. I'm also inclined to leave out the rear axle seals per Ashcroft advise and comments on here.
I'm intrigued by Daan's suggestion of leaving out the front seals as well. It makes sense to me. I've also thought about oil (EP90, I assume) in the hubs before now. I've never been convinced by the "one shot grease" business, especially as (I think) series LRs used oil. I had assumed that the change to grease with the introduction of the coil-sprung LRs was because of the change to the ball bearing type of CVs from the prop shaft type which were (I think) used on series LRs . Clearly the ball CVs will run on oil, so why not? Any other thoughts on this?
I also plan to drill and tap my swivel pin housing/stub axle carriers to take a drain plug like the earlier ones. If using oil, draining and re-filling will be easier.
Once again, I'm really grateful for all the suggestions and advise. Please keep it coming!
Jeff.