binding and…

Hi guys i need advice i have 2 boards a ride dh2.5 and a gnu street series and i have 2 pairs of bindings a pair of 2010 ride nitranes and also 2011 ride lx’s which binding suits which board better:dunno: and also my nitranes some time feel as if the dont hold the back of my boot when i lean forward should i be adjusting the backs forward or is this normal?? thanks