I have ellipse zero on ultrasonics and getting true customs soon. Im gonna try the 20mm pitch first then go down to 15 then 10. As stock pro sharp profiles have 20mm pitch built in. Ill update this thread after trying. But im sure the holders higher pitch is going to be noticeable. I skated back to back tf9s and ultrasonics. The tf9s feel like skating in high heels. Will take some testing to dial in. If that doesnt work put tuuks on and go.