advancing ignition timing has always been a cheap, easy way to pick some power/torque at the lower end of the powerband. your engine should run a bit cooler as well.
I wonder how what you've done would compare to those ignition advancers they sell? that way one wouldn't need to worry about over revving beyond the current redline.
good work.
now if I can see about making my later pregen CDI that I bought work on the new gen.