I haven't had much motive to reverse engineer Sai2 that much since Sai1 is still very much more popular but it possibly uses some improvements on the Sai1 format.
Well, I'll keep working on it, unfortunately my reverse engineering skills are terrible so it's really slow progress haha. I'd love to work with you if you're interested but I understand there's not much purpose yet. What tools did you use to reverse engineer SAI? I'm using IDA + WinDbg and a crappy hex editor... This page isn't great for extended talking though, email me if you want (myusername)@gmail.com.