Replying to Demo Bindings on Jib skis?

I was thinking of putting some Rossi Axial Pro 120 (Look P12) Demo bindings on my PE 179s. The will be my all purpose inbounds ski. I thought it would be fun to be able to move the toe and heel towards chord center if I was going to be in the park most of the day and way back if I was going to be in some powder. OTOH, I was worried that on park days the added weight and lift of the demo plate system would cancel out the easyness created by moving the binding forward. Any thoughts?
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