Buckeye....
"I" prefaced ALL "my" comments with "I".
"I" don't know any serious shooters that use a WB. Maybe "I" don't know too many "serious" shooters, but NOONE "I" know uses one to shoot 3D (and FEW hunt with one).
You also said you don't know any shooters that use a spring steel
(which from what you have been saying must be the best because thats what thepros use.) so it must not be a very good rest either.... After all no one you know uses one.
I am not debating the WB here but rather your outlook on this subject.