N10 (Clamptable BAR file 3)
N20 ( CRH ELECTRONICS DESIGN 1/10/07)
N30 (START POINT BOTTOM LEFT CORNER)
N40 (T4 2.5mm Centre drill set to 3mm clearance)
N50 G0 G49 G40 G17 G80 G50 G90
N60 M6 T4
N70 G21 (mm)
N80 M03 S2000
N90 G00 Z3 Y0 X0
N95 G43 H4 
N100 G91
N110 G83 X10 Y12.5 Z-5 Q2 R1 F50
N120 G91 X20 Y0 L4
N130 G90 G0 z3
N135 G0 x0 y0

N140 M6 T5
N150 (T5 3MM TWIST DRILL)
N160 G00 G43 H4 Z3
N170 G91
N180 G83 X10 Y12.5 Z-7 Q1.5 R1 F50
N190 G91 X20 Y0 L4
N195 G90 G0 z3
N200 G0 x0 y0
N210 M5 M9
N220 G90
N230 M30
N240