TLT 6 won't work with the Marker Tour. Both the front lip and the heel peace are basically too short and not build for normal bindings. They only work with Pin style bindings like Dynafit Speed Radical or similar. If you don't want your girl to end up with broken legs or knees, then don't try and make that combination work, because you will never get a reliable release.There are boots, like the Scarpa Gea RS that will work with both, Marker Tour and Pin Style binding but the TLT Mountain is Pin only.