The topdeck looks VERY narrow, and looks like it might allow for the servo to be flipped around. He's also got the single steering post, as someone else mentioned. Presumably, the narrow topdeck is beneficial if you need a lot of flex.
He's running the SRC offset rear bulkhead. I wonder how long it'll be until Corally makes one of their own? It seems like a lot of guys are using it now.
The new topdeck appears to be drilled specifically for that single steering post, so maybe there's something in the works? Is he using the old arms? I can't tell for sure. The C blocks and rear hubs have that "prototype blue" color about them.