This is the motor (CX-500, CX-650) that will eventually hold many if not all of the pushrod gas class records. Big bore, short stroke, twin cylinder, 4 valves per cylinder, water cooled. Makes our old British bikes look prehistoric! I recognized this before I started my BSA build, but I am more familiar with the simplicity of the BSA single, so that's where I started. So far, so good. I might be able to hang on to my records for a little longer!
Your alignment technique looks interesting. It looks like you're using the rear wheel as "true center", and aligning the rest of the bike to it - - seems difficult because the head stock and frame which are not necessarily plumb would put them in a different plane from than the wheels. I used a straight line on my jig, actually the edge of my jig (like snapping a chalk line on your floor), off to one side of the bike's centerline, and used a spirit level vertical and measured over to center points on the frame, wheels, triple clamps etc. Ideally, a rotating laser level, like we used to use to erect 20 story buildings (which you can rent from a good rental store) would be nice. They have a target that can be attached to a rod that is held horizontally at a given distance from the rotating beam, which beeps when on target. They seem to be accurate to about an inch in 200 feet. Or I thought about erecting a flat sheet of MDF board vertically at a given distance and using it as a reference plane. I don't know how other people do it - - no one here to ask. I don't believe that a small degree of error on a motorcycle frame makes much difference at the speeds I go in a straight line, but it's still nice to try to get things aligned properly the first time.