My collection is growing

https://eviltoast.org/post/20909204

file a side flat and boom instant (hand) router blade.
Hold up. Tell more.

I’ve always seen them curved like this:

But I suppose they could be straight; here’s one that looks like it just uses a chisel (doubt it would work as well though):

OH! Very slick. :)
yep. thats exactly what i was thinking