Thanks John. I think the transition between the wing on the STi and the SS are pretty much the same. I did think about the flex (or somewhat lack of when using PTFE) and my thought was to use the quality rubber for the area of the wing fold and then go to the PTFE. The rubber would be only in the fuselage for maybe the first foot or so to a shut off valve for the tank and then PTFE down to the header tank. So most of the line inside would be PTFE. With the exception of the barb fitting on the banjo the rest of the connections will be all AN6.

Appreciate any and all inputs. Especially any that tell me I am heading for issues that others have learned about through experience.

Gary