VCore 3.0 300 Belt and Resonance graphs

Picked this up used pretty cheap, done some adjusting and these are where I am at now. I used Klippain Shaketune to generate them. I'm planning to reprint and upgrade the printer to 3.1 sometime in the future so I'm not after perfect results, but curious to know if there's any obvious things I could check that would improve these without taking things apart right now?