I show how to use my woodworking trick to cut compound angles to make a wooden tray with all four sides tilted. We can see how despite I cut compound angles in my homemade miter sled, when I join all the pieces all the parts come together to make a perfect rectangle with 90 degrees angles.
How to make the table saw miter sled: https://youtu.be/JfCrxTMYnb0
How to cut compound angles with a miter sled: https://youtu.be/TUdNagyz2fk
How to make a spline jig to reinforce miter joints: https://youtu.be/W-6sevl61q8