Areyou having scaling issues with ESTLCAM? When I take files made in inches from autocad to ESTLCAM as .dxf there is a downscale of who knows what factor. I have ESTLCAM set to import inches and my machine export mm. Not sure, but thought you might have the answer as you are in the US and probably use inches.
Also your setup looks great. You make me want to clean up my workspace.