The lightest bindings we have in the shop are the Flux DMCC Lights (which claims to be the lightest on the market). If weight is the ultimate issue for you, there are models such as the DMCC Light (and possibly the Rhythym - We do not have that spec) that could save you some weight.
My interest was to compare my Rhythm with the lightest Flow-binding. Weight vs easy-strap-on.
The Flux DMCC lights is not an option for me....at the moment
-- Better to have tried and failed and not tried at all --