^^^ Sure. But after FJ's work came out, and then the rest of the 70s onward when ST hit it big... why didn't MJ go ahead and do it?
I'll accept his word as the creator. His would be the definitive, and he needn't be limited by actual production costs since it'd be only his illustrated designs, only limited by his imagination.
Was it a matter of copyright and license fees and all that?
Jefferies work would have been welcomed by fans, even if off-the-record in an unofficial capacity. He could have shown the whole Enterprise as he envisioned it.
Why didn't he?