Re: In search of big browns on the San Juan NM
Nah- the T-hole is deep, but not deep enough to need a sink-tip, at least at normal flows. Plus when the fish start feeding on emergers they won't be sitting at the bottom of it but rather in the first three feet.
But, if you find you need to get really deep there without a sink-tip, you can do this. Take your standard 9' 5x leader and add 1-2 feet of fluorocarbon tippet before you even tie on your first fly (normally I cut my 9' 5x leader back to put on some fluorocarbon tippet to the first fly). Then tie on your first fly- annelid, midge, streamer, whatever (tippet may need to be heavier for some streamers).
Then you can take another 1-2 feet of fluorocarbon tippet and add your second fly. Make certain you use the right amount of weight, not too much or too little. Place your strike indicator high up on your leader. Doing that will get you as deep as you'll need 95% of the time. And usually I can just get to the desired depth by adjusting weight and indicator placement. Remember to estimate the depth and place the strike indicator around 1.5x the depth you will be fishing.