I don't get better draw when I use a closed bridge, for any amount of draw.Many things done instinctively are the result of unconscious observations gained through experience. When players who are comfortable with an open bridge then switch to a closed one when massive draw is required, usually have a better result, for whatever reasons.
The only open-bridge people I have seen get better draw results with a closed bridge are the people who have stroke flaws that would tend to lift the cue during the stroke with an open bridge.
You might be surprised how many people out there still think a swoop/swipe stroke can impart more spin. For those who still believe this, lots of explanation and evidence proving it wrong can be found here:Others are truly fallacious, such as ‘swiping’ to gain more english (the subconscious mind adds 2 plus 2, and gets 5). More tip surface contact area = more spin. More contact target time = more spin. Thus, swiping = more spin. WRONG! The unconscious mind often makes unwarranted assumptions, regardless of resulting experience.
swoop or swipe stroke resource page
Regards,
Dave