Replying to Old tom wallisch hot dogger 2012 boots shaking in new marker griffon bindings

Ight so last year I picked up some new 2015 al dentes and new marker griffon bindings. I've also been using my hot dogger boots for over 2 years now and only this past season I noticed that my boot would shake in the binding. So i moved the heal piece up a bit to make it more of a snug fit. The boots are pretty beat up and I am wondering if getting a new heal piece might solve some of the shaking.