bridges have a pretty wide shovel in the front compared to the rest of the ski...i think they were made more with traditional mounting in mind. i'm sure they'd be okay, but they just might ski a little funny switch if they were centermounted.
however, i have the walls and i'm very happy with them.
if you're looking for a fat park/all mountain ski like that, check out the liberty hazmats too. they seem more park oriented to me.