More progress shots.
The first pic is of the Flexiride axle splined axle shaft. The second is the adjustable trailing arm spindle. The trailing arm is adjustable for height only, not width, as there is a groove that mates with the pinch bolt making the width non-variable. The third pic is the axle tube mounted under the trailer before the new brakes
and hubs were installed. The axle was bolted to the spacer tubes with 1/2" grade 8 flange head bolts and locking nuts. The original Scamp axle was welded to the floor supports to help support the center of the floor. I fabbed a bolt together strut to serve the same purpose, but be removable with the axle.