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On http://www.latticesemi.com/view_document?document_id=213 Lattice caBGA-756, ECP5 FPGAs, based on the left sub-panel top_row = height - hole_dist_top); } module mounting_hole_m3(h=thickness, flange=8, style="nut"){ cube([flange, flange, h], center=true); if (style == "nut"){ // a hexagonal cutout (undersize to.

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