[Al 29Tudor]

Tom,
[1. Carrier pre-load. Assemble and install carrier, no spider or axles, bolt up both axle housings. Add spacers under carrier bearing races in axle housings until carrier won't turn. (Is it ever necessary to shim the races?)]
Page 34 of your 2014 dissertation answers this question and states any shims required can go under the bearing - easier than the race in the axle housing.
Next get a handle on the yoke.
Wow!
Al Leach