#1 is an old version of NNN, #2 is a manual version of SNS Pilot, #3 is a version of NNN, #4 is an auto version of SNS Pilot, and #5 is another NNN. © Jared ManninenSNS Propulse Carbon bindings. It's not very clear in this photo, but notice how wide the gap is above the white "SNS" label is. This large space easily accommodates the second bar of a Pilot boot. Look at the image of the Profil binding above and you'll see how narrow the space is, which (in that example) does not accommodate the second bar. © Jared ManninenThese types of skis and bindings need to be permanently retired. Do yourself a favor and invest in some new gear if this is similar to what your current setup is. © Jared Manninen