Well I broke down and bought a 15 inch coil for my AT - PRO. Should arrive by Friday. I see how D was finding deeper and had better readings with his 15 inch coil on his e-trac. I hope I can compete with him now and start finding some deeper targets. I'm also waiting for a "sale" of the new Garrett waterproof pin pointer. I hope to get in the water this year and the new pin pointer will be a plus. Now the weather has to cooperate and warm up.