Open mouth....insert foot.
Now that I have taken both the Hangar 9 aluminum mount and the Great Planes glass filled mount to the Post Office and weighed both on their digital scale I've found out that what I percieved as a couple ounces difference in weight turns out to be only about a half an ounce difference between the two.
The Hangar 9 mount weighs 5.6 ounces and the Great Planes mount that came with my 1/4 scale extra weighs 5 ounces. Until I get my fingers calibrated I won't be making anymore comparisons without first going to the post office and finding out the truth.
As for the choke arm. I ground off the end of the carb rod, took out the choke butterfly and then made a new arm out of brass and silver soldered it in place of the original arm. A more ingenious modeler on another thread found an easier way to accomplish the same thing. He went to his local hobby shop and got a metal rudder arm made by Prather and slid it right on in place of the original arm and tightened the set screws and was done. Most arms are nylon with an insert but the Prather is solid aluminum with the set screws and fits perfectly.
My choke is actuated by the retract channel and works great. By the way. I read another thread where the guy took out the detent ball before he reinstalled the butterfly and rod. Don't do that. The rod will be loose in the carb and genertate RF noise. ASK ME HOW I KNOW!! Adjusting the travel on your retract channel is all that is needed and the servo doesn't bind even with the detent intact. Using the metal arm you don't have to mess with taking out the butterfly or rod. Simple.
Scott....Looks like the only way to get a lighter mount is to use the titanium as you have began. Good luck with that.