Ok. Some progress. Firstly, if something has 'professionally' been converted. Check everything.

X was upside down.
Steps were wrong. Explains why some circles too big and some too small.

Still having a lesser issue. I should end up with a 10mm profile but the G Code is not making that happen. The left over sizes are too large. I suspect its something on the Fusion tooling side, its as if its adding in some additional size somewhere. There is nowhere below where I can get a 10mm and 5mm profile. The closes to zero the X goes is X7.729.

N25 G98
N26 G97 S4000 M3
N27 G0 X17. Z1.347
N28 X12.971
N29 G1 X12.828 F250.
N30 X10. Z-0.067
N31 Z-4.185
N32 G18 G3 X10.981 Z-4.541 R1.794
N33 G1 X13.809 Z-3.127
N34 G0 Z1.404
N35 X11.828
N36 G1 X9. Z-0.01 F250.
N37 Z-4.024
N38 G3 X10.5 Z-4.335 R1.794
N39 G1 X13.328 Z-2.921
N40 G0 Z1.404
N41 X10.828
N42 G1 X8. Z-0.01 F250.
N43 Z-4.
N44 X8.413
N45 G3 X9.5 Z-4.084 R1.794
N46 G1 X12.328 Z-2.67
N47 G0 Z1.404
N48 X10.279
N49 G1 X7.45 Z-0.01 F250.
N50 Z-4.
N51 X8.413
N52 X8.456
N53 X8.5 Z-4.001
N54 X11.328 Z-2.586
N55 G0 Z1.404
N56 X9.729
N57 G1 X6.901 Z-0.01 F250.
N58 Z-4.
N59 X7.95
N60 X10.779 Z-2.586
N61 G0 Z0.62
N62 X7.729
N63 G1 X4.901 Z-0.794 F250.
N64 Z-5.
N65 X8.413
N66 G3 X10. Z-5.794 R0.794
N67 G1 Z-8.544
N68 X12.828 Z-7.13
N69 X14.
N70 G0 X17.