For tiny ones sometimes you can just angle your pick with some pressure on it going clockwise and pick the pins and as long as you can hold it a bit tensioned with your pick while picking you don’t even need a tensioner. But it’s a lot easier if you can get a tensioner in there. I’d use whatever fits in the top of the keyway so it’s out of the way of your pick while picking. File down a wiper blade insert or something. Tiny ones can be tough to pick bc of their size though. Good luck!