Replying to Mounting Alpha 1s?

I'll keep it quick--I just picked up a pair of these bad boys and a pair of Look pivots, so I was wondering if anyone has any insight on where to mount. I searched and found that mounting them center may not be the best idea due to the elf shoe tech, but i've never mounted a ski at recommended (-2.5) so i'm a bit hesitant. anyone have personal experience? I ride like 70-80% park out here in the east, and maybe 50% when i go out west. usually i wouldn't ask, but the tip and tail rocker sounds like it may be a bigger deal mounting them closer to center