Tried to make a machine called farm. It assembles and the recipes are shown in NEI. Hovewer I can't perform any of them.
hbmCustomMachines.json
hbmCustomMachines_from_hbmconfig.json

The custom machines seem to use the wrong value for looking up recipes, the workaround for this is making sure that the unlocalized name of the machine and the recipe key are the same.