Replying to Changing bindings on my SV!!!!Need advice!!

Finally i found the ski i lost this winter in a Backcountry day!!
At this point i would like to change my bindings (VIST...ie 4frnt)
Do you think i have to move the new one at least 2 cm back or i can remount the new one more or less at the same point??
I don't wanna move them too far back nor too forward. (they at at +2.5 now for pow)
The reason why is that i don't think Vist is a so solid binding and had often some problems with them during all the season (and at the end i lost one ski) I was thinking at LOOK
Thanks