I spend a lot of time tunkering and trying different things. Rests, arrows, peeps, sights. You name it. I have a chrono and use it extensively. One thing I NEVER worry about is kinetic energy. Kinetic energy is just another thing that gets beaten to death when in reality any bow of 50# or more shooting a properly spined arrow produces enough kinetic energy to down any deer on the planet, regardless of draw length or anything else. There are just too many other things to worry about. Shooting form and mind control being the prime considerations.