how to route small finger joints
I have a machinist's level that goes in a box. The box is damaged and I'd like to make another one, or at least repair the existing one. I have 2 questions:
1. I've included a picture showing the size of the finger joints. What would I use to make these? I have a Leigh jig, but I don't think I can route fingers this small. Would I set up a dado blade and use a fixture of some sort to get the correct and even spacing? They seem to be exactly 4mm, which is odd because this is an old American level (Starrett #98). However, they could be 5/32 which also seems like an odd number to use.
2. I'm also going to use oak because I have some. I think the original box is mahogany, but I'm not sure. Anyone see any issues with this?