It definately makes you feel more "open" to the rail, but I'm still trying to get over my fear of bashing the shit out of my knee again. A few weeks ago I was hard way 270ing onto a down rail with a ollie to it and caught my tail. My knee still doesn't feel anywhere near 100% (maybe 60%) so I'm trying to take it easy right now.
Oh, and spinning BS onto rails off your heels is AWESOME. I learned back tails/back lips off my heels the other day and it's just as fun as toe-edge FS spins, if not more so.