Initial parametric framework and powercopy failures:
Parametric rectangular pattern formwork based on a critical base point that can be modified:
Variations of the spacing and base points to create different patterns:
And then I found the limits of the sweeps:
What I'd like to do next is to use a spreadsheet to drive the parameters of the start and end lengths of the straight runs. The powercopy is set up such that the straight pieces are controlled and then a curve connects the two endpoints.