Wanted to add my experience for anyone wrestling with hubs on their own. When reassembing a set several years ago, I assumed the spacers were the same dimension and that they were interchageble. That proved not to be the case.....if you choose wrong (50/50 chance) and don't have matching dimensions on both sides, you get one spacer that rattles slightly between the bearings, and on the other hub, at least one beearing that does not seat 100% properly in the hub.
The next time I messed with this I had diferent set of hubs (from 1056) and measured everything carefully. Turned out the L anf R spacers differed by about 0.003" in length. The L and R hubs were machined with a corresponding difference. Hubs are hard to measure directly so I used a series of go/no go gauges to determine size.
Lesson learned was don't mix these parts up and you should be OK! Regards to all, Nate