Yeah, you would think this would lead to a big snafu up in the front, but of all the installations of the engine kit, jack shaft, etc, going to 18 speeds was ironically the easiest. It just worked. No adjustments. Nothing!
The key was the low mount front derailluer which keeps the swing/pivot assembly out of the way of the jackshaft kit. Regular front derailleurs wont work. Cycle recycle in waynesboro has a several of these things in their N.O.S. inventory. It is a cheap shimano STX assembly Perfectissimo.
Here are some more pics of the assembly from different angles.
Not only did all three front rings fit, there was enough room to squeeze in Paul/Jims chainguard inbetween the right jackshaft drive and the large chainring to keep chains from jumping/touching.
If I can find some long length 50mm or so 5mm*1.0 bolts, I will order some aluminuim sprockets from you.