Replying to Mounting the ski and then changing boots.. !

Next week I will have my pipe cleaners and my bent chetlers and I am gonna mount them.. the thing is that in 1 month I am gonna change ski boots which will propably will have a different sole lenght.. The mounting guy from the shop told me that if I do that the binding center will change because I will have to move only tha back part of the binding to fit the new ski boots.. So i will end up with a ski which will not be mounted at the same point as at the beginning.. what should I do?

thx!