wildemere, I have two MB's but I might also commission a THIRD BIKE, "The Dragon Lady", another twin-engined cruiser for commuting. It has dual friction drives; the front drive is cannibalized from "The Iron Dragon" while it's awaiting parts.
I could use my Titan rear drive for wet weather, then bolt the rear friction drive onto the front tire. Of course I'll need two more identical engines.
Wife thinks I have too many bikes.
She just doesn't understand.