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@wedge
For odd shapes I bought a set of Chinese curved files ("rifloirs").
Not the top like Pferd, but often very useful.
https://it.pferd.com/en/pferd-tools-riffler-files
@GustavinoBevilacqua
I have one rifloir. I always forget about it. It’s pretty coarse, though.
I found them on eBay years ago.
