Looks like the arm could be replaced to make it a little longer. I have started putting servos on my chokes, and love it. Having all of the control on the TX is very nice. Otherwise, I really like using a Golden rod cable for the linkage. I run them back to a hatch on the sides of my planes, sort of a control panel, with all of the other switches and such in there.

On my last install, a DLE 55 on a GP Ultimate bipe. I removed the detent ball so the choke would swing freely, and I put a servo on it. Works great.