FYI I just got a ProsKit 900-215 Nibbler off Amazon for less then $20, and it's great! Using it on my QB fuse to take the rough cut gear holes to almost final. I I can get it almost right on the inner skin, so then with a little bit of filing, it will be perfect. Any who need another tool, get one of these. I can see how they'd be quite handy for small trim jobs that are hard to reach.
https://a.co/d/iir9FqD
https://a.co/d/iir9FqD
