Line on writing or desktop has “property” in the right time to get lost in the pile of papers, drawings, details. Fasten to the edge of the table, two cloves, and even better — screw two small screws with round head (not clung to); in the line also make two cut so that they easily included screws. Now the ruler will always literally at hand and never lost.
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Applied the last stroke of paint on the Board-float; the number sewn to the sail, varnished mast and you start thinking about the first release in the "open sea". But, before you do...