I've recently made changes to the LDD version of this model, which I've added below.
About this creation
My original design. The basic shape is correct, but I was never happy with the side hatch.
Starboard. I have designed decals, but have yet to print them. I also have yet to order the bricks for my changes :(
My custom minifig crew, with uniform decals from eBay.
The original aft cabin. The sliding door design will remain the same, but the wall will move forward a bit to accommodate more details.
The nav and helm consoles. The only change I am making here is the dorsal closure, which will be a bit more streamlined.
The main change I made was to bring the cabin separation forward quite a bit. This doesn't adversely affect the arrangement of the forward cabin, but it does allow enough space in the back for everything that is supposed to go in there.
Here is the revised aft cabin, with accurate engine details. There is a phaser locker in there as well, and room for a toilet, although I haven't included it. Besides, since the roof doesn't open over this portion, you'll never get to see the phaser locker. But at least I'll know it's there!
Finally, you can see the impulse engine is thinner, and the side hatch looks more accurate.
And some last minute changes, because I just can't have a shuttle without a toilet that you can see! So: hinged roof, deuterium tanks, phaser locker, toilet, engineering control panel. NOW it's done!