We did not need the inner 18" of the 26" diameter polar disk with the conical polar axle. We cut inner 18" of the disk out and used it to build the torque tube shown here. The upper portion of the tube was found in the scrap yard.
 

Figure 1. A torque tube mount made from left over parts from the 22".

The Declination bearing housing is made form a piece of the 4" tubing bought for the 22" Dec axle.
 

Figure 2. A four roller rocker assembly is used to roll the disk on. The level jacks were from a cloud height detector.

The torque tube mount uses a similar arrangement for the north polar bearing as the 22".