Disassemble Ultegra hub because of slight drag.
Cleaned and inspected cups, cones and ball bearings.
Greased and assembled.
I made sure to adjust bearings with slight play. Axle turns smoothly by hand.
When spinning the drag is as before the disassembly.
This wheel with a specific "hand torque" spins for 10 secs. All other rear wheels spin for 30-40 secs with the same hand torque.
Is this an inherent problem of this particular hub? Is something further I might try?
Any advise is appreciated.