h a l f b a k e r yYou could have thought of that.
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Maybe avoid using on buildings with rough concrete and brick bits? just a thought |
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Rather than traditional suckers, you could use a powered suction system that only kicked in when the undesired movement was detected. If the cage started to move too far away from the building, or started to swing dangerously then the suction kicks in. [+] |
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But wouldn't these leave marks on the windows, thus defeating the purpose of the cleaning? |
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No the marks are cleaned off by the cleaners as they descend. |
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Instead of rollers, how about caterpillar tracks? |
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