Leonard -
I tie a "San Juan Variation" for the Bluegill here in North Texas (not a ton of trout fishing here).
I use size 10 - 12 TMC 2488H and only tie in the micro chenille to extend past the bend of the hook just a bit less than the width fo the gape. Then I dub a little Super Brite in the thorax area and whip the head.
I have also tied it with the chenille extending equally beyond the bend and the eye with the dubbing in the middle of the hookshank resembling the clitellum.
- Gary
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"Catch 'em all...Put some back!"