Hi all.. first post.. Wife bought me Atomic Doubledecker Redster SL's a few years ago, then we had kids and they went unused.. First time out the other week and the heel piece was loose. I discovered that a black oval retainer was missing on both skis.. Took to my local shop and they said atomic is going to replace the heel pieces.. however I really think this is part of the ski (doubledecker plate) and not the binding.. Trying to get back on the snow ASAP.. any experts out there? I used to be a ski tech but a lot has changed since the late 90's. Pix attached. Image of the skis without bindings is from the website showing the blue mounting rings. Thanks!