The IDlers

and the rear idlers have the rear chain to cross once to reverse the drive and the keep the chain in line with the chain rings
The middle idlers to keep chain tension and to have the chain going straight on to the chain rings.

This the front idlers to get the chain under the front of the trike

Here is port side of the jACK sHAFT where the chains come together as one.


The whole trike messily stitched together can ya see the reinforcement changes.