Paul, I used a Goldberg nosewheel steering arm, it looks like the one on the throttle but a little bigger (I like the way it looks. Symmetry!) Grind off that worthless metal arm with a dremel grinding wheel. Drill out the nose gear to 3/16" and fit it over the choke shaft. Position the plastic arm where you want it, then take it off and file a flat for the set screw. I took the choke mechanism out to work on it, you unscrew the choke plate, then the shaft comes out, but be very, very careful not to lose the tiny ball bearing and spring which can fall out onto the floor or into the carb. keep the throttle closed while you take the choke out slowly.

When I re-assembled everything, I put the spring and ball bearing back in place so that the choke snaps into open and closed positions. Without these parts, the choke plate rattles around. The servo drives the choke easily because the plastic nose gear arm is so much longer and provides lots of leverage.

The servos for the choke and throttle get mounted in the top left front corner, canopy compartment, they are stacked on their sides. They hook up with plastic sullivan pushrods.

Peter