You can do ten different drawings, tweaking this and that, then start the first build.
The first attempt doesn't look quite like the drawing. You wish some angles were different, decal placement could be better.
On the left is the first prototype build. On the right notice the slight changes.
Some are obvious. Instead of being square, a trailing edge wing taper was added. The Stars and Bars was changed back to the original, correct five point star after I found out I could use it without paying to use it. U.S.A.F. stayed as the U.S.F.F. The "missile" wing lugs were cut at an angle.
The air intake was made larger without the long taper to the back end. This was changed for easier construction. The new cut easily slips and "locks"over the main BT-50H body tube against the wing root edges. It spreads out a bit and ended up more of an oval shape.
I wanted this model to have a lot going on visually. Pieces overhang and under hang.
The nose cone will probably be plastic, longer and closer to the size used in the Centuri kit.
Now if I could just get the right thickness of clear plastic for the vacu-form canopies!