Got tired of waiting on the BC Precision ball set, the complete 2nd axle with new cones etc showed up, along with Park grease, so I assembled the axle with cleaned old balls to see if the wider cones make the OLD too wide, and I'd already planned for a similar scenario so had bought a stack of thick M10 washers, which are now coming in very handy as I had to lose the original very long drive side 2nd locknut/spacer and replace it with 3 washers and thin locknut.
Hubs sounds excellent, super smooth, and drops into the frame like it should, OLD is dead on.
Somewhat bizarre was the total lack of wear in the races built in to the axle, no visible wear, must be Kryptonite.