i've got a little space, and i had mine heat molded too. i haven't got any shinbang, or any boot problems at all so far this year. full tilts really are ill. i think i have a space just because i've got skinny legs. if you do too thats probably why.
and i love how whenever there is a boot related question everyone just yells out 'go to a boot fitter!!' 'get the boots that fit you!' haha its like we all just put a blind fold on, got piss drunk and walked into a ski swap and grabbed the first pair we could find in our blind, drunken stumble.
but a fitter really does help