not necessarily. i have my recoils slightly in front of where they recommend. i know the recommended mount for the on3p jmo is like -4 behind center (which is more all mountain oriented), but on3p even says a lot of people chose to mount -1 for park. its all about personal preference and where the recommended mount is. some people like skis more centered, and some like them farther back, so going a bit off the recommended isnt bad