My RT10 brake assembly looks like the removable FR14 assembly that @macon documents in post #40.
I suspect your Crest is the same.
I haven't tried removing mine yet, and I suspect you might need to fabricate a cover plate to control snow packing in there.
I'll bet we're looking at a net 40-50 gram savings, if you add back the weight of some light leashes, like the ATKs or Plums.
... Thom