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Much of the thinking expressed here can be applied to similar Bosch distributors. Many of them are similar enough in design to where, with a little thought, these tricks can be applied.

There are slots in the bottom half of the shaft and pins in the top half that act as hard stops to limit the advance. They can be modified by elongating the slots. The end of these slots are not normally reached in an unmodified unit.

Beyond that, one weight is the "primary" weight that advances in conjunction with the other for quick off idle advance. The other weight, or "secondary" advance weight takes it from there to full advance at a slower rate. The post that the return spring mounts to also limits the travel of the weights and can be adjusted by bending (until the hard stop pins are reached). You can also grind weight off of one weight and weld/braze/solder more onto the other weight to further change the advance characteristics.

009 distributors are, like most anything else, can be modified. Bad ones are not really bad, they just need to be tuned.

Put the timing light on it and carefully watch the advance. If the advance flattens out where the primary weight hits the spring post, bend it out some until you get a smooth curve. This is very feelable as a flat spot when driving.

The 009 can run well up to 7k, and even farther and is as good as many other similarly designed Bosch units. They just don't like high voltage coils because the cap is so small they are prone to arcing.

Noodle through the info here and mix it with what you are trying to achieve. Step out and try something new.