Replying to Mounting bindings

i just got a brand new pair of rossignol scratch bc 05/06 with rossi scratch 140 bindings. i was told by someone to mount the bindings between modern and standard to get a better park feel. i disagreed because i am the kind of skier who would much rather hit some moguls, the woods, or just bomb some groomers. however i do go into the park occasionally to hit some jumps with various tricks. the length is 178, where should i mount them?