There is nothing made that will accommodate advancing the magneto. You’d have to fabricate something and it would have to be strong enough to overcome the resistance of the mag plate’s clamp and ratchet assembly. Regarding the throttle, you picture the Vacturi “pumper” carb and on the bottom there is the butterfly’s bellcrank that has a hole for a cable stop. I haven’t looked at my SE-50 with that carb in years, but I suspect there is a bowden cable clamp somewhere on the port side of the carb. That carb was designed for cable operation, so all you need is the cable stop, which is a round brass piece with threaded ends for a screw and has a hole through the middle for the cable to pass through. The screw then tightens the cable (wire) and the slot in the bellcrank is what keeps the assembly in place.
George
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