The inside of the Pilot Model hub includes a grease cup that is designed to prevent grease and other contaminants from spotting or staining the brake mechanism that is covered by the hub. This cup employs a thin gasket to assist it in carrying out its function.
When I removed the cups (or rings if you prefer) the OEM gasket were destroyed having been either glued down or having adhered to the two mating surfaces over its several decades of use. This necessitated making new gaskets. Fortunately, Bob had a roll of paper that he had acquired a few years back that had a similar texture to the original gasket, but also had a finished inside coating. He explained that it was a waterproof membrane and that the paper was used to wrap bundles of map making paper. In any case, it was the perfect replacement for the gaskets.
The cups provided the template for cutting and the bolt holes were a perfect match for the large hole punch that we have at the barn. Two gaskets were knocked out in quick time.
After coating both sides with silicon gel, the gaskets were laid inside the hubs with the cups and the bolts were re-installed.
One had to be careful to make sure that the splines on the bolts meshed with the cut outs inside the bolt holes and that all of the bolts threads were similar in direction - as these hubs are side dependant. After a few gentle taps with the hammer and a wooden block, most of the bolts seated nicely. The heads of the bolts secured the cups and gaskets nicely.
The hubs were then turned over and the spacers installed. I used the wheel nuts to press the spacers into place and this also served to seat those bolts that didn't seat previously.
Next project: the other two hubs.