if your skis aren't yet mounted, just go to the shop, explain this, and they'll mount your heel so there is room for the heel to be moved back to accommodate for a bigger boot in the future.
or, you can just get the bindings taken off and remounted next year if need be. it will probably cost around 40 bucks (pretty standard for a remount in VT anyway). This shouldn't be a big deal, as most skis can handle up to 3 mounts before durability gets sketchy. My skis are on their second mount and i've had no issues.
The only thing that's warm right now is my dong.
Well it's kinda sore, but it was sore before so it's not any worse.
-my friend after breaking his shin in half