Converion based upon my old Deckel Mill

[Kitwn]

Gcode is nothing but text so you can save it with any extension your email will allow. .txt for example and change it to whatever MACH3 wants on arrival. If it's the file size that's the problem then try some simpler shapes! Even the Aztec Calendar at 400mm diameter is only 6MB and I've just had a look at my collected files for all sorts of projects and most of them are only a few tens of Killobytes with some (cutting out gears for wooden clocks as an example) still under 1MB.
Alternatively save each part of the machining as a separate file (right click on each machining operation in turn and click on 'Enable/Dissable MOP' to turn them on and off).

You can always attach a CamBam project file to a post here as a .zip file if you want us to have a look at the work in progress (You may also be able to cheat and simply change the file extension from .cb to .jpg or .zip as long as you tell us exactly what you've done, but I've never tried that in practice).

In practice I do as driftspin suggests, design everything on my desk computer and carry a USB stick with the Gcode to the dedicated machine computer.

Kit