For fishing on a upper Wisconson clear water lake for smallmouth and largemouth, is yellow 20# braided line with about 2 feet of 20# fluorocarbon leader a good setup for throwing a black 5" Senko rigged Tx style around boat docks and sunken brush?

Factually, that is about what I do on the clear highland lakes that I fish.  I use 30# yellow Power Pro with a 15# fluro leader.  I believe you may be right on target.

Wayne, with yellow line i would say 6' or more. No bannanas or yellow line in my boat!    Start with at least 4', and that will allow more re-ties before you have to start over.

I am dissappointed in not hearing from the light/clear line folks saying it can't work. Anyway, I have been using the Stren Super Braid 20# and 30# in the gold color for 5 years with 2'-4' of 20# XPS Fluorocarbon for a leader. I use the fluorocarbon as a weight to make the braid sink. I use that combo for wacky rigging Zoom finesse and Trick worms. The clarity of the water has been a non-factor in the number and size of bass I catch as thousands of bass have been caught that way in all conditions.

The loaded question part: Yesterday morning I was watching a Roland Martin show on the Versus network and the location/conditions/presentation I stated were from his show. He didn't mention the braid color in his explaination of the presentation, but it was very evident what it was. He caught several 2# class largemouth and several 3# class smallmouth. He was using Power Pro and a fluorocarbon I am not familiar with ( can't remember the brand ). He tackle was spinning gear which I use 90% of the time for that presentation.

I'm glad your set-up works well for you, but I have found that line diameter and visibility has a tremendous effect on my smallmouth success. In clear water I fish original Yo-Zuri Hybrid #4, otherwise #6 Ultra Soft. The difference in these lines vs. 8 lb Hybrid are significant for me.

8-)

A loaded hypothetical question

OH Up all night with the Dewars again? Opps ,sorry I misunderstood the question.my mistake