Replying to Binding mounting

hi i just got some new fujas with solomon s810 ti bindings. i already got them mounted from the shop, and im 6'1, 160 lb, and obvoisly i freeski and do all kinds of terrain. when i got my skis back after becoming mounted, they didn't tell me how far back they put them, put obvoisly it isn't center mounted. my front binding is where the center is about. now will this REALLY effect my abillity to do rails and spins? i know it will be harder, but i dont know how MUCH harder it will be. thanks