I bought my AC4's and found when I got home that they didn't have the piston. The store told me that many believe it doesn't do anything. That's a horshit answer. The ski comes with the piston, and on resale a buyer may wonder where the piston is. Please sell me the ski as advertized. The piston does no harm and leaving it off should be up to the customer, not the store.
There are plenty out there who will make my decisions for me - I don't need yet another one.
. . . and on that subject, WHY must I be offered only bindings with enough ramp angle to make them fee like high-heeled shoes?! Sell me the bindings FLAT. If I want to vary ramp angle from flat, I'll arrange for it myself, thank you. As it is, I have to prop up the toe to get - not NO ramp, just LESS ramp. For anyone who questions my concern, try this: On your current skis and bindings, whatever they may be, try skiing with a shim of about 1/8" under the toes of your boots. Focus on what it feels like. Then take the shims out and try skiing with them under the HEELS of your boots - and you won't need to "focus" to find out that excessive ramp angle SUCKS. Thsi was one of the on-snow excercises we did at ESA Aspen under the guidance of boot fitters Bud Heisman and Eric Ward (Eric is inventer of the patented "Shim Balance System" and a primo boot fitter). What an epiphany! Thanks, guys!