I've used velocity stacks and fine metal mesh filters a few times. Expect to inspect & clean more frequently, but the performance is killer (though maybe not the best for longevity...).
As a generalized, non-scientific observation - I find that tuning issues like these crop up more frequently on bikes heavy on bolt-on upgrades. It's like half the bike is set to blast hard, the other half thinks it's stock, and finding a jet that spans the range is impossible. But glad you're making progress; you'll get it. Great looking bike.