Thank You but I guess there is no hope in ever seeing the sandbox mod.

forget sandbox it would be fun just to be able to explore the solar system in a ship and move to the differant planets

Unfortunately not. I abandoned the project.

I'm a little late to the party on this one. And I have no idea if this project is still ongoing.
But this is the raw definition of ambitious. I'm seriously impressed that this even exists.
One could possibly make an Escape Velocity remake with this.