T8 Nut to 20mm extrusion drill plate

Template I made to adapt a T8 nut to 20mm extrusion. I clamped this template to a piece of 1/8inch by 2 inch flat cold rolled steel I bought from home depot. You could use the aluminum flat bar they have there too, it's just more expensive for the same size piece. once it was clamped in place I used a center punch to mark the holes and drilled them out using a 3mm drill bit. then I came back and used a 9mm drill bit to drill the center hole for the nut. I used a drill press for maximum accuracy.