To finish the Spill Plane (progress posts 1, 2, 3, 4, 5), I first had to make the wedge pretty. You can shape it any way you like. I cut mine to length, marked off a flat area at the top & back end of the wedge with a combination square, removed the waste with a block plane, and sliced the corners off with a chisel.
For the remaining pieces, I chamfered all the edges with a block plane and file, both to protect the edges from getting damaged and to add another facet to catch the light, applied 4 coats of one of my favorite finishes, Watco Wipe-On Poly, exchanged the steel screws for brass ones, and decided the Spill Plane is sufficiently gussied up and ready for its new home.
You can make a Spill Plane any size you like. I believe many Spill Planes were user-made (someone correct me if I'm wrong) and that's why so many of the antique ones you come across all look so different from one another. Mine was made with just 4 pieces of wood and a blade, but as far as I'm concerned, the side escapement piece isn't necessary for the plane to work. You do, however, have to plow a channel below the cutting edge of the blade so the shaved wood has a place to peel off.
Here are the sizes of the pieces of this plane.
Body (Ambrosia Maple): 3 x 12 x 1.75
Top (Walnut): 1.875 x 12 x .625
Side Escapement (Walnut): 2.3125 x 12 x .75
Wedge (Ambrosia Maple): 2 x 4.9375 x .875
Blade: 2 x 6 x .125
Recently, I attended an antique tool auction where a Spill Plane went for $180! I made this one for about $15. To think that the user-made planes were built with few tools but lots of ingenuity just amazes me. Because they were made by people who didn't have the arsenal of tools many of us hobbyists have today, and because they were probably made in a hurry (to serve a purpose), antique user-made Spill Planes aren't typically as clean cut as the one I built....but they most certainly have more character.