This is getting very much into the details but just because I know some people enjoy the trivia...there was actually one more.
LB recorded a joint called Star for 9th Wonder's Dream Merchant 2 compilation album that for whatever reason was removed and replaced with No Time to Chill, which was also recorded around the same time. But anyways, LB included Star as a bonus track on Leftback and 9th threatened to sue if they didn't remove the song, so they did and Phonte went on a little Vimeo rant that has since been removed.
I'm mostly just telling this story so I can post Star, because it's in my list of top 5 most underrated LB joints. But yeah, Star, the joint with Wayne, and No Time to Chill are pretty much the last 3 joints that they did over 9th beats. And on No Time to Chill Pooh even says "Khrysis on the boards" but he means Khrysis is recording/engineering the song. That line has incorrectly led some people to think Khrysis ghost-produced the joint, which is not true. 9th did the beat. I also like Phonte's ode to Quiet Storm on the hook.
Finally, the joint with Wayne is one of the only 9th beats I know of with claps instead of snares. Final piece of trivia. They didn't really seek out Wayne. They ran into him a radio station and he said he was a big fan, which surprised them, and it ended up being a fairly organic collaboration. I remember it surprised a lot of people considering how big Wayne was at the time.