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Never heard of the test. But one time I did try and copy a rooter company who used a tennis ball on the end of there camera to elevate it out of water. ( we had the spacers but sometimes they get stuck in 90's)

We got the camera stuck and eventually the ball came off and went down the drain. :ROFLMAO: :ROFLMAO: :ROFLMAO: :ROFLMAO: :ROFLMAO: :ROFLMAO:
last time I tried that trick :D
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