I add about a 30 to fourty foot tippet of mono 15 -20 lb test to the end of my 20 lb fireline, this way I know wher to clip in, and do not have the release issue. Makes trolling deep easy, enough shock resistence that I have never lost a fish due to the fireline breaking. Getting a good knot to connect the two lines is another story. Good luck,

NEN cool
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Never Enough Nookie