Fantapants, the Howe design will still need an adaptor to be made similar to what I have made.as you still need to replace the nose of the gearbox with some sort of blanking piece that will house the oil seal. Milling time is not that much of an issue, especially on a CNC machine. The main advantage is the symetrical bolt pattern, and hopefully a larger diameter centre hole for the W series box. i have ordered one and will see how it goes. i have had a quick look at the commodore unit, but it is horribly expensive.