I lay 2-3 rows of tape longer than the 4 sides put together and then lay each piece down using the edge of the bench as the straight edge. No need to put tension on the tapes as when you fold the pieces together it will tension naturally. Once folded i put the box in a square corner jig and leave it to dry and if required i use 2 rubber bands to keep the corners together in case of any twists or bows. Have done this with over 300 boxes and never had a fail.
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