I hope the next pics will show us whether the lower attachment point of the spring is actually right above the pivot of the bell-crank it is on, so the spring's lower point does not move when you change the speed setting. If that is the case, the bell-crank seems to have become very badly bent - perhaps it used to be bent the other way, to the left instead of to the right, so the spring attachment is way to the left of the pivot. Anyway, let's see the pics and maybe we can work it out from first principles. Otherwise, someone else with a Quantum might post a picture of his governor, and we can go straight to the answer instead of working out the design of the governor linkage from scratch.
