Hi steelgoose.
I installed CopperCAM and tried to work the image VoltageRegulator_with_switch_copperBottom.gbl but I'm still trying to understand how this tool can help me.
Therefore, I do not understand how You could generate Gcode from Gerber Fritzing (version 0.9.3) but I suppose You could have had a lot of work.
The maintainer of app GCAM did some testing with that Extended Gerber (RS-274-X) generated by Fritzing. See results in CNCZone Forums
In my opinion, the biggest problem is the quality of Gerber generated by Fritzing, with regions divided into blocks that should not be divided to generate a Gcode. This can be seen in GerberFritzing.jpg and already mentioned in another post here, in the Fritzing forum.
Can you explain in a little more detail how you worked Gerber generated by Fritzing in CopperCAM tool?