Yes - think of them this way, it's a Griffon binding on a track that allows the entire binding in it's current BSL to move along the ski. However, you can simply turn the screw on the heel piece and change the BSL just like on the normal Griffon, however it can really only be moved about 2cm on this track (about 1 full boot size), and it depends on how it is mounted as to if that's 2cm forward, 2cm backwards, 1cm one way and 1cm the other way, or anything other than that. So, if you want the BSL to be able to get bigger (for example) by 2cm then have the binding mounted with the track all the way forward (although, some shops wont do this because it requires math when using a jig - but if it's a really legit shop they'll probably do it for you) so that you can move it back (so if it's mounted for a 27 boot, you can get a 28 in there, maybe even a 28.5).