SB wrote:
you can fit Hyperglide sprockets onto a Uniglide body by grinding or filing off the one wide spline. This is not particularly difficult. You'll still need a threaded Uniglide sprocket for the top-gear position. Supplies of these are getting scanty.
I happen to have an unused threaded UG top gear I could part with.
Brown also mentions freehub transplants on
this page. Is that no longer possible with today's FHs?