I just wanted to note that all the AX's come with a three inch length of flex cable that inserts into the needle valve to provide an extension and without the problems noted by Jaka. Even has a nice thumb wheel for the other end. I find this very nice and I normally leave them full length on all my AX's and I have a bunch. This is especially appreciated on some of my multi engine airplanes.

The pictures above are a .35 AX engine.

John