With my Heath-Robinson milling machine, WP. It consists of a drill-press, an inexpensive arbor & slitting sawfrom McJing's, some bits of scrap hardwood and a few bolts & wing nuts. Rearrange them a bit & presto.....
Attachment 487866
The moveable block acts as the fence & can be set to expose a teeny bit of blade, then moved back for successive cuts:
Attachment 487865
With the brass bar being fed past the saw by hand, the cuts can only be very light, about 1.5mm per pass at the most, but it doesn't take long to slot half a dozen backs. The most taxing job is setting the saw at the right height - that can take me 10-15 minutes of fiddling!
And this jig is another thing that's way too big for model-sized stuff - the brass needs to be about twice as long as the gap in the guard/fence for safe passes. I can see why modellers all seem to own small milling machines...... :C
Cheers,
Edit: If it makes you feel better, I had to google to find who Zawi Hawass is. But now I know, it might be a good idea to ask him - you never know, he might be a closet woodworker & have a deep interest in both ancient & modern saws! :U