Working on my wife's Roadstar trike conversion. It will be pretty much the same as I did on my Stratoliner.
First picture shows the axles before cutting the hubs off, chunk, adapter plate for rear sprocket, and the rear sprocket. All drilled and ready to bolt together.
The second picture shows the two center bearing mounts.
Third picture is the hub cut off of the axle.
Last picture of the pillow block bearings. Two large ones for the center section and two small ones for the axle ends.