Well, after successfully opening up several Hasselblad backs without mishap (for the purpose of replacing light seals) I've now managed to strip the head on one of those tiny little screws. Bummer.

I've looked around a bit and it appears there are some screw extractors available but they all look like they're for larger screws.

I don't currently have a dremel tool but I could acquire one if there is a small enough attachment for grinding a deeper slot into the head. Or is this not the right approach?

Anybody have experience with this and can offer advice?