Kudos on this series… Quite well done and worth watching.
I didn’t understand the words of wisdom re the last and second to last points on a spline curve. He repeated this so I assume this is important so perhaps someone could explain this better for our challenged learners?
From an aircraft design perspective this plane will never take off, fly and land. It needs a horizontal stabilizer, and flight controls: ailerons on wings and rudder and elevators.
Or more unconventionally, a forward wing/canard like this…
If the S3D file could be made available, perhaps users would do refinements and additions? Maybe even a contest?