The earlier ones set idle by backing out the throttle stop screw, with the spring in the control lever.The later ones with the throttle bump set idle by backing out the side arms set screw.
It hadn't occurred to me the idle was set there so I did learn something from it, but it didn't click that you were talking about the tiny spring IN the governor lever and not the larger hooked one between the pump top internal arm and the lever. Lack of reading comprehension on my part I think.I do still need the detent spring and ball from the side cover, or I gotta make one out of something.