$fn = 128; module Plate(){ difference(){ square([7, 8.2]); for(i = [1.5 : 5.1 : 6.6]){ for(j = [1.6 : 1.27 : 6]){ translate([j, i]) circle(d=1); } } } } //linear_extrude(5) // Comment this line out for flat milling sketch Plate();