RE: grim reapers
Just make sure the blades are neither too tight or too loose. Going in and out of a quiver can loosen them up and if they deploy in flight it can really screw up the aerodynamics. Too tight and they may not open up properly. One great thing about the Grim Reapers is you can shoot them opened up if for some reason where, or who you are hunting with does not allow mechanicals.
I switched to a fixed blade this year (Hellrazors) because I was tired of checking the blades everytime I climbed up, and because changing the blades is more work than resharpening a fixed blade.
The terminal performance is incredible. I shot a 350# Black Bear in June. 18 yard shot...15 FOOT recovery.
Good Hunting,
Bowflex