The three planes described here are based on similar assembly. The key element is using the top of the plane for alignment of the core blocks, and doing this glue-up in two stages. The plane body is kept open for fitting the wedge before the second side is attached.
A mortising plane for leveling hinge gains whose opening is without side air is shown at the top of the photo at right. A simplied shoulder plane, 37° bedding angle and side shaving exit for planing edge joints is in the middle. And at the bottom, a full shoulder plane with skewed blade is shown with the 19th-century Ohio Tool Co. example behind it.
The shoulder plane is a good choice for beginning plane making — good-looking, functional, and hard to mess up. Give it a try.