dddd: the hub is a Deore XT front HB-M750

FBinNY: Thanks for the input. Maybe the better bearing would be a 26x10x8.
That would permit the use of a full-length sleeve that could be 12mm or so OD
reduced to 10mm (a thou or 2 less for clearence, for the engineers out there)
with a 9mm ID. That would permit use of a standard threaded axle w/ locknuts and
avoid preload.
I am successfully using a Ritchey front hub designed for a "Skraxle) which was a 9mm skewer/axle all in one,
but using a 9mm threaded front axle w/QR and conical springs. It is a similar configuration.
More work, I know, but I love to tinker.
Who knows, maybe a kit could be marketed??

As for angular contact cartridge bearings, I understand the need for such in theory.
I will check some sealed cartridge bearing hubs to see if they employ angular contact units.
Those that I have found are close to $100.00/ea and up.