@ RG
Looking good m8.
Now for my input. Since this is not designed for atmospheric flight, the need for rearward swept wings is not needed for speed.
I would forward sweep the backend of the wings to a negative 5 degrees, match the tail-fin in design as the wings (but low profile),drop the wings down another 3 degrees or so and level the canards.
This will enable for torp/missle mounts under the fuselage if you like and will allow you to mount 2 guns in the nosecone, 2 - 4 more under the wings.
I know it sounds a little off for you, but go ahead, make is a seperate file and send the results to me before you post it. I think you will like what I just recommended.