Looks really good! What I was told as far as the knee goes is to use it as a "buffer" once it touches, try to bring the bike down more and more and more and more because you can use your knee to give you a "feel" of lean angle. Basically you'd be bringing your knee up and in as you SLOWLY bring the bike further down, but it's a lot to think about whole you're actually doing it.
I just recently dragged knee for the first time at chuckwalla, and when I showed someone my left slider, that's how they explained it to me. So I went out, tried it, and it seemed like I could gradually increase speed a bit more through the turn. But idk.
Just do what makes you feel good. Speed will come.