I'm no expert on cartridge machines as I don't use em, but what difference would a Cheyenne adapter for any grip make, it would still be a cartridge grip and therefore still a cartridge machine with the plunge bar etc. If he's saying you can use traditional needles and tubes then I think you are right and this bloke is talking bollocks. Or is he just making a point that you can use any grip and not just Bishop grips? Mind you, I've just confused myself so I'll let someone who knows what they are talking about clear this up for you.