Ladder jack scaffold.
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Previously:
https://www.homemadetools.net/forum/...702#post147876
https://www.homemadetools.net/forum/...664#post123576
https://www.homemadetools.net/forum/...519#post132193
https://www.homemadetools.net/forum/...2215#post75959
https://www.homemadetools.net/forum/...044#post160658