Binding mods rule! The Naxo NX21 backcountry skiing bindings is solid, but anything can be improved. 2015: We had to remove the link here as it went bad, but nonetheless can say that back in the day of Naxo bindings, various individuals figured out modifications to reduce play and flex in the binding, thus making it perform much better. In this case the modder made clever use of simple plumbers tape as shim material. Note that “tef-tape” is a good thing to experiment with if you ever need thin shimming material.