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Dstep = 71;
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Margin = 3.125; // 6.35mill; 12.7mm bushing
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Acutout = 55;
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difference() {
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square([Dstep*5+100, Acutout + 100], center=true);
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for (i = [-2, -1, 0, 1, 2]){
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translate([i*Dstep, 0])
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offset(r=Margin)
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square([Acutout, Acutout], center=true);
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}
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}
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