[Rees Guitars]

I'm a total CAM newbie, but I'm watching some tutorials and starting to get the hang of it.

Not sure if the problem is with mastercam or mach3, but the rapid toolpath (which should be hovering the bit above the workpiece) cuts down deeper than the cutting toolpath. This leaves a nasty line through the workpiece.

Here is the beginning of the G-code:
N110 G54 G0 X99.286 Y-163.176
N112 S18000 M3
N114 G43 H1 Z162.837
N116 Z72.837
N118 G1 Z60.837 F2000.
N120 X173.225 F5000.
N122 X198.231 Y-153.286
N124 X76.091
N126 X60.648 Y-143.397
N128 X214.902
N130 X228.029 Y-133.508
N132 X48.676
N134 X38.924 Y-123.618
N136 X238.848
N138 G0 Z70.837
N140 Z160.837
N142 Z162.837
N144 X394.41 Y-113.729
N146 Z72.837
N148 G1 Z60.837 F2000.
N150 X345.861 F5000.
N152 G0 Z70.837

Also, you can see in the picture that some of the little curves/turnarounds are sharper than the rest. Any ideas what could be causing that? Also looks like I have it programmed for a bigger tool, but that's no biggie.

How do I convert the G-code from metric to inch in X editor?

Thanks soooo much.
-Ed