SBM Distributor overhaul DIY?

Fired it up late last night with the heavy and medium spring from the FBO kit and the limiter plate on 14. Car definitely liked going from 15 to 20 initial and had to back the idle down quite a bit. Something is goofy though because I'm getting 40 degrees total with no vacuum advance. This is measured with the Inova timing light feature, I don't have any timing tap on the damper. Zero was confirmed with a piston stop. Need to tweak the carb and check a couple other things but it's almost like the plate isn't working. I added five initial with a lower mechanical limit and got five more total. I'll map it out and then pull it back out and try another slot with no other changes. One of the original springs hit the floor and disappeared so that complicates changing one thing at a time.