The big shuttle based on a Starmax from Starcom.
The front hatch needs to be shortened a bit. The holes are designed to fit 1/8" primal horizons magnets to keep the hatch attached. The rear slide out bit hole is designed to fit an M4 which you can tap with a helicoil.
Update: I've added the parts called 'WingStop' which can fit over the rear wings to hold them place. Also, updated the glass bits for the rear hatch.