Thanks! The carb adjustments helped a ton. I still feels like maybe I could use an even higher number power valve than the 10.5, as it cruises around 2800-3000 rpm with about 17hg of vacuum, but I'm pretty happy with how it runs overall now.
I made the same two changes with mine. The tip in at part throttle is where the power valve helps, and it cured my flat spot. I'm not sure they make anything higher than a 10.5 anyway?