No need to buy a new binding, if you want to make the switch from 75mm “duck bill” to NTN boots, simply unbolt your BMFs from your switch plate and bring them to us at VPO Squmaish - an authorized Bishop dealer. We will be swapping out the toe cage - or you have the option to send them to Bishop Shreds in the US (where they will do a complete refresh/clean/lube on the whole binding). Unless you are a do it yourself person with mechanical skills, they suggest letting the experts take care of it.
Note: the BMF/3 conversion is more expensive as it is a much bigger part being the entire front end of the binding.