I understand what you are getting at . . . it keeps the club on the plane ANGLE . . . . BUT . . . . the club moves in an Arc right? So why would you want it to stay on the board that long? The club POINTS at the line. It doesn't (or shouldn't) stay on the line.
It would be a good device to keep the person from raising the handle up and shutting the face fast.
This doesn't make any sence.
I can only assume by your post that you somehow think I am saying you are sweeping along the board for infinity .
Like the clubhead, the head of that brush travels in an arc. The idea is you just take your normal golf stroke and brush a portion of that board as it travels in this arc.... Not drag it along the entire board !
A straight line is a straight line - the fact it is on a board 90 degrees to the plane angle intended for release doesn't alter the fact. You are still maintaining a straight line relationship to a straight line. All that the board does is make the plane angle and plane line visually easier to see.
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