Despite its name, Phil Lowe generally doesn't use his shoulder plane to trim tenon shoulders (they are too short and narrow), but it is his go-to tool for trimming tenon cheeks. The low-angle, bevel-up blade works great against the grain. And because the blade is as wide as the plane's body, it can cut all the way into the corner. There are a few things you need to do to ensure your shoulder plane becomes a shop star: Make sure it has a flat sole and square sides, and make sure the blade is as wide as the body. A few tweaks here and there, and you will be in business.

From Fine Woodworking #226