If the R4 hub has the spokes that thread into the hub it's not worth using them in another build. You can get spokes from Easton but they are not cheap.
In any case if the hub and rim are still good you could just replace the nipples while leaving the spokes in the same position. The wheel might not be quite as reliable as a new build using new parts but if the spokes are left in the same position it's no worse than removing tension and re-tensioning the wheel. Not like reusing spokes in a new pattern.
That'd be cheap and would leave you money to buy parts to build another set of wheels.
I think the front is the straight pull type where the spokes are in the hubs. I'll put up pics when I find time.
Being in Australia it is expensive to send to a USA shop to rebuild and return but may look into it in future as I think the hubs are still good and I think they spin nicely.
My issue is this, What am I getting by buying expensive hubs? On the attachment some ideas of components I'm thinking about, with weights and price (would like a build around the 1400g mark). Also, I can get a set of Fulcrum Racing Zero Dark Label 2013 Shimano / Sram landed in Aus for $879AUD (1435g). So what does a Tune/Alchemy KinLin build give me over a Racing Zero for the same type of Money? In turn, what does a $900 wheelset provide over some of the cheaper build options I have priced up that I could probably land in Aus for around $450 - $500 and have them built here for another $100?
Not having ridden loads of wheels is the investment worth it over a factory or cheaper wheel build? At 80 - 85kgs riding mainly flat group rides, no racing yet, and not to harsh on wheels. Any help guidance appreciated.