Steve,
depending upon the need for adjusting the sights, you should be a bit careful with the tool that you use. Some of these sights have been in place for years and can be difficult to get out. Some of these tools are made of brass which is a soft metal and the prongs break quite easily. Simpson used to sell a stainless steel one that would hold up better. But he doesn't sell it anymore. Those little prongs can break off and you will have lost your investment. People will tell you to heat up the sight to expand the metal and the screws will come out easily. But you may have destroyed a pricey tool before looking for an alternative. Besides, I don't feel comfortable using heat on a very expensive artillery Luger. But it MAY work.
What I did was take an old screw driver and I notched a small groove in the end. Then I took my Dremel rotary tool and formed the pins around that notch to fit the holes in the artillery sight. As Albert said in his post, the prongs have to be pretty near perfect in shape. Don't make the pins too long though or they will also break. I got lotsa old screw drivers to play with, but I don't have lotsa $100 bills for new 'original' sight adjusting tools laying around. This works for me.
Just a suggestion.
Big Norm
