INTERIOR G68

N10 (ORGX54=0, ORGZ54=90)
N20 G54
N30 G0 G90 G95 G96 X100 Z100 F0.08 S110 T1 D1 M3 M41
N40 G92 S2000
N50 G0 X80 Z0
N60 G1 X-1
N70 G0 X100 Z100
N80 F0.05 S85 T2 D2
N90 G0 X40 Z0
N100 G68 X39.771 Z-60 C1 L0.25 M0.1 H0 S310 E350
N110 G0 X100 Z100
N120 F0.035 S95 T4 D4
N130 G1 X39.771 Z-60
N140 X46 Z-60
N150 G36 R20 X55 Z-25
N160 G36 R2.5 X68 Z-2.5
N170 G1 X72 Z0
N180 X77 Z0
N190 G0 X100 Z100
N200 M30
N300 G1 X39.771 Z-60
N310 X46 Z-60
N320 G36 R20 X55 Z-25
N330 G36 R2.5 X68 Z-2.5
N340 G1 X72 Z0
N350 X77 Z0