I used a CR80 Hub, laced to a 17" wheel. Used the CR80 disk also. Along with MB5 forks and caliper.
Off the top of my head, without going down to the shop and looking at it. Pretty sure the hub fit right between the fork legs with little or no spacer work. The biggest job was milling the inside of the caliper to clear the CR80 hub/spokes. The CR80 is a fairly wide hub, so the spokes are farther out than the spokes on the cast MB5 wheels...so the spokes interfered with the caliper. Had to shave a few MM off the inside of the caliper so the spokes could rotate without touching it. Other than that it was a fairly "bolt-on" affair.
It's worked perfectly since I did the mod about three years ago.
JohnnyB