QUOTE(OmegaSix @ Nov 18 2009, 11:15 PM)

Or you could not cheat and ruin a controller... Just a thought.
Since all you're doing is changing the drive's pcb, you can buy ANY kind of Hitachi. The hardware is the same in all of them. The only differences between the Hitachi's are all on the PCB. Therefore putting your pcb into a 79 will make it a 46.