I used the Rocky Mountain 2 blade Snyper a couple years back which seems to be near the same design. Not the rage, but hope this helps:
They did fly and group right with my fieldpoints at all ranges. I liked the idea of a cut on impact head andminimizing the loss of KE when opening the blades. I took three deer with the head none went more then 50 yards, but all shots were in the boiler room. The only downside I experienced waswhen I would stalk through extremely heavy brush and cover. I sometimes walk with my bow and arrow pointing behind me withthe bowrunning parrallel with my leg.In this position, the blades would sometimes snag on brush, grasses, etc... and the the blades would come open or loose. I tried shooting at a target with loose blades just to see what would happen if they came loose in the field and I did not notice before a shot.There is no accuracy and a lot of noise with non-secured blades. The Snyper did use a rubber band system to keep the blades in and I am not positive about the Rage.
Hope this helps.