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Originally Posted by Jones571
How well do these "sucking" devices do. If the ball gets bumped around do they hold well?
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oooh....very well..si..si..as soon as I can I will release a picture. Ours can stick to walls, glass, and works even if there is a slight leak. And yes we've used ours as a punching bag, swung our robot in circles (although this is a bad for our top-heaviness with ball and tank steering.) and done everything else you could think of.