It was quite a wait on the carb kit, but quick since it came from Taiwan during a pandemic! The carb kit definitely improved the performance- well worth $13. I'm letting it warm up outside to get my wife to catch a video of it running around our track before it rains again. I know it's still geared way too low just by seeing this video. At least it runs well now-
https://youtu.be/1c7VuCJV4m4