there is no such thing as core centre, its CORD centre which is not the running length of the ski but the strait measurment from the tip and tail of the ski...on some skis its close to true centre, others it isent
you are the one who screwed the pooch on this one, so you've gotta take it like a man and ride it anyway, or just remount. Either way, don't sidle the ski company with your problem.