Anyone here play with or use these. I made up new arrows, Easton XX78 2413's. They weigh in at 465 grains, travel 280 fps out of my 82nd Airborne set at 62lbs. I'm getting 81 ft lbs of KE. Thumping power! Anyway, I bought one of the Easton Tracer Nocks to play with. They work with a magnet you put on the bow. The nock is activated with the magnet and then it's what turns on the nock I read. It stays on for 10 seconds then blinks like a beacon. I'm anxious to play with it. Anyone else have any experience with them?