I’ve gotten good results with Coiltek WOT coil in different applications and wanted to have one available for the Minelab Excalibur but not have to use it all the time as they can be hard to swing in fast water. I also really like Mr. Goldmaster’s headphones which connect via an Ikalite plug. This is the end result–interchangeable phones and coils. A lot of top hunters swear by the 1000 (Blue Tubes)–saying that it’s more stable. I have one at Minelab being fixed that will also get W/P connectors to be part of this kit along with my Sovereign X2 Pro.