The notch profile above works for aluminum sheet metal having a springy temper, such as is widely sold to the building trades as flashing (9 mil thickness,) trim stock (18 mil thickness,) and gutter stock (27 mil thickness.)
For example, with 9 mil (0.009") aluminum flashing a width of 1.5", tangent circles of 0.125" diameter, and outer rounds of 0.5" diameter are suitable for weaving with locked crossings.
If the weavers are to cross at an angle other than 90-degrees, the diagonals of the crossing rhombus remain perpendicular to each other, but rotate together to align with the crossing's planes of symmetry. The notches translate to maintain tangency.
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