Where to re-mount trouble makers?

[umby]

I have a pair of 181cm trouble makers that I mounted last year w/ marker griffons at -2cm from center (305mm BSL). I did not like how the skis skied with that mounting position to the point that I used them only for a few runs. I am planning on remounting them for this coming season in hopes of using them for bumps. I was thinking of pushing them back to the recommended line (5 or 6cm back from center?) if it is possible. Any suggestions on where to mount the skis for skiing bumps? I have no idea if moving them back just to the recommended line is far enough back because last season the tails seemed way to long. Thanks for any suggestions.