Replying to Does the CAST touring system make a huge difference?

Hey NS, I’m currently looking to purchase the CAST system and I’m curious about one aspect... how much heavier is it on the ski? Is it noticeable or doesn’t really have an affect. I really want to have a ski that I can still spin super comfortably on and have rails locked without a large amount of effort. I will most likely pair these with a set of ON3P Jeffery’s or Kartel’s (if I can find a pair). Otherwise I’m not quite sure what ski but regardless how much does it affect the ski and do you notice it?