Rail Version - As with the Trains I made for Company B lineup, the wheels will come in different widths. Most likely S scale as default, but versions for O, HI, etc. All I'd really need to do is print off a new set once the interior wheel measurements are set.
Next Model T's, theres the Scout version for WW1, Then the Hotchkiss 1908 for the Turks and Ottoman Guns cars of various makes.