This is the model of a a small (6 inch) wood working mitre smoothing plane.

The bed angle is 20 degrees and the blade is sharpened to 30 degrees, resulting in a cutting angle of 50 degrees.

The metal plane is made from steel with the sides [silver] brazed on. The silicon bronze pins hold the sole in place during brazing. The blade spine is welded on. The blade is made from a Stanley bench plane blade cut length wise.
The can read about the process at:
https://zkprojectnotebook.wordpress.com/2012/10/05/how-i-make-small-mitre-planes-introduction/

Note: The plane in the photos have had an hour or so of sanding on the sides and lever cap.

To assemble the plane you will need:

• 1/8" and 1/16" drills.
• Hand chuck to hold drill so you can ream holes without power.
• 1/4"-20 tap (maybe). I tap. You might be able to use a bolt to clean the thread.

• 1/4"-20 die (probably not), a nut will work to clean the thread.

• 1/8" rod, 1" long (I use welding rod).
• 1/16” rod, 1/4" long (4 pieces, welding rod).

Printer settings:

Defaults:

• Layer height: 0.15mm
• Infill: 15%
• Support: None
• Brim: None

mitreM1_blade.stl
mitreM1_body.stl
mitreM1_wedge_plate.stl

• Use defaults.

mitreM1_bun.stl

• Use 5% infill.

mitreM1_cap_screw.stl

• Use your slicer to add high detail above the thread.
• This part has a built in brim and support. The support should only touch a single thread at three points and will easily peel off. It will leave little blobs on the thread that can be cleaned with a nut (or die).

mitreM1_lever.stl

• Use support from the build plate (only).

mitreM1_wedge.stl

• Use 5% infill and support everywhere. You only need support for the tunnel if you want to add a modifier.

Assembly

• Do any sanding of the sides now (optional). The other parts can be sanded later.
• Machine the threads as needed.
• Using the 1/8" drill in a hand vise, clean up the hole in the lever and wedge. If you use power, do it SLOWLY.
• Cut the 1/8" rod long, file to length and round over the ends.
  The lever notch (cutout) faces down (towards the blade).
• press the rod through the wedge and lever.
• Screw in the cap screw.
• Run the 1/16" drill through the holes in the wedge plate and plane sides. Note: These are not through holes.
• Cut the 1/16" rods long, file one ends square, the chamfered and to length. Test fit before you assemble (just press part way in to check alignment) or you will be printing new parts. Press flush with the sides.
• Press the front bun into place.
• Slide in blade (logo up).
• Slide in wedge.
• [Very lightly] tighten the screw.
• Done

https://youtu.be/8wO3bCo5dxk
https://youtu.be/HD8U8afRrCU