If you're inspired by legoloverman, you got some BIG shoes to fill, dude. However, looks like you're 75% there. I would smooth out the transition from the wings to the nose and give it a more triangular shape, as well as removing all the greebling right in front of the cockpit, as it visually confuses the shape of the ship. Other'n that, great job! I love the engines incorporated into the wings- good work.
For someone who don't own a Classic Space Set, this is more than simply good, it's great ! The shape is a bit complicated maybe, but anyway it's beautiful, cool greebles and the cockpit is amazing. Nice job !