I live just down the street from Greg's Custom Rods... I think I have a build in mind now.Something I mentioned in the other forum... The pin is also a deadly short-fin grayling tool. A couple people have commented on my Whitefish Death Machine (WDM) that Jim Kerr mentioned in his blog post a while back - 10' 4wt CTS blanks and a Young's Lightweight reel.
Going your own way | Fishing Report
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It's just a super scaled down steelhead/salmon float rig with a 4-6gr float, 1/8oz inline and a #14 Copper John, maybe a tiny pinch of tungsten putty if the current is faster.