I modified my OFNA starter box to suit my NTC3 better.
I have attached some pictures, and will explian the mods after.
I basically flipped the wheel and motors around so the wheel is sideways, but closer the the front of the box. This required cutting a new opening for the hole (not too bad with a dremel and cutting wheel).
I also moved the wheel over to the left side of the holder (there is already a hole there, just undo the 2 screws, slide it over and re-screw).
With the motors and wheel in this position, the wheel would interfere with the power switch, so I relocated the switch to the front, below the panel.
The car sits pretty well square on the box, except it is to the right a little to allow the fly wheel to hit dead top centere on the starter wheel.
After I mock fitted everything to ensure it would fit, I sanded, primed, painted and enameled the box blue instead of the faded pink.
I just tried it for the first time today, by turning over a brand new Nova RS12T ... no problems! Fired first try and every try after that.
Requires a little work, but works perfect for my NTC3!