I find the concept of "rotation" a little puzzling. I want my primary EDC to always be in a familiar spot, and work the same way each time, so that in an emergency there less chance of fumbling. By emergency, I am not meaning only self-defense. Usually, when a knife is needed to protect life or property, it is because someone is tangled, snagged, or trapped by inanimate objects such as line, rope, webbing, netting, etc. My EDC is the Gunting, often/usually backed-up by another blade, depending on circumstances: Rescue 93mm, Kiwi, Civilian, CRMIPT, Gunting Trainer.