PhattKatt's 1st Upgrade: Idler
A view from below reveals the subtle upgrade from the stock idler:
Idler developed for the Actionbent Tadpole Trike (TW/Bents trikes):
Flange-nuts were machined to accept a 12mm ID bearing (in hand):
Detailed drawing for the Delrin idler (bearing captured with circlips):
This upgrade was very simple and made for a nice clean chainline on PhattKatt. The first adapter/flange-nut fixed the axle solidly in the frame, and the other half captured the idler solid to the axle. A new chainkeeper was added and the stock nylok hexnut finishes the assembly with the tube-clamp.
This idler has proven itself on the ABTT. 1500 miles and virtually no wear.