Exporting to Cinema 4d is straightforward.
Once your board or kit is ready, hide or turn off all other objects that you don't want to export.
Press A on your keyboard to select all.
Click on File > Export > FBX. Give your file a name and don't forget to make sure that Limit to Selected Objects is checked.
Now in Cinema 4d Import your FBX then apply the scales by clicking on Tools > Axis > Reset Scale and the cog for options.
For the options turn on both of the checkboxes.