The new rear wheel and cluster arrived today. I swapped it out in a couple of hours with a minor change to the cluster. The old cluster was an 11-32 SRAM PG-950. The new cluster is an 11-34 SRAM PG-980. Instead of an 11-34 cluster of 11-13-..-34, I replaced the 13 with the 12 of the old cluster. The two smaller cogs cluster the gearing on both ends (high and low) and spread it out in the middle. The new 34 is for mountain climbing. The new low gear is now 19 instead of 20 gear inches. The gearing is a bit customized and requires some attention.
The wheels now match; both Mavic Open Pros on Ultegra hubs. The rear is a 36 spoke for the extra weight and the front is a standard 32 spoke. Both handbuilt from Bikeman. Very nice.