UPDATE:
Yesterday I put together the seat post mount and u-joint assembly. Thank you to another of my customers for getting me a roll of welding wire (free!) and my old dead Ford Exploder for donating the u-joint out of the steering column. This brings the total cost to date to $0.00. Still on track for the budget!!
I decided to pedal the trailer around the house a bit just to see what it feels like behind the bike and I must say I'm surprised at how well it handled! When I was bubble-gumming it together I tried to keep the bulk of the weight below the line between the pivot (u-joint) that mounts to the bike and the rear tire to give it a self-righting pendulum effect. Something I learned from one of the posts on this site. Thank you to the person who posted that little bit of info. The balance is spot on! I even had my daughter (who is a small people) ride it around and she had no problem with it. Can't wait to see this thing run.
Just about have all the wiring figured out but still don't know how to hook up the mag. The two wires from it went to the ignition switch that is destroyed to the point of not knowing where the $#!& the circuit goes! I think one goes to ground with the key in the off position to kill the engine, and the other goes to charge the battery?
Anyone have any info on this? Couldn't find anything online and I would hate to fry something. That would put me over the projected cost of $0.00. I'm trying to make the fuel the most expensive part of this build. HELP!