I have size 9 DC Judge boots (2012) which I believe are rf. My brother has size 9 Celsius boots (2011 I believe) and we can't even fit each other's boots in each other's bindings. That's how big a difference it is between two size 9s. I'd say it feels like a good 2 sizes difference in the shell. I wouldn't expect that much of an improvement but you might be able to at least help your problem a bit.