Good Day Fellas, I have been land and beach detecting for the last 5-6 years. I am now looking at Water detecting. I would like to be able to fit 8" - 10" - 15" Coils to an Excalibur 2, and am looking to find Waterproof Couplings suitable for this purpose. I will only be using this in 5' water or less, and on the beach, keeping my E-trak for the Parks and Footy Fields. Can anyone help with what type of couplings are suitable. Thanks in advance, Bob