If this picture is uploadable you will be able to see the changes George has made to the Choke assembly. The ball assembly has been replaced by a throttle lever from a lawnmover/garden tractor. The assembly is available from CTC in Ontario. As you can see the center piviot has been replaced by an AN3 bolt because the pivot post was just swaged in and it did not permit tension adjustments without breaking.
The pictures will have to follow. I used Adobe to organize the pictres and the website will not accept the compressed files.