Mr Ghostface said:

Well, now you do. And every single friend of mine who watched it spotted it right away. For one thing, it still has the tint that the effects in Empire have, which is slightly blue, whereas in A New Hope the Star Destroyer shots have a warmer temperature to them, and they are very distinct. But yes, he just lifted effects from elsewhere in the trilogy and composited them together, with mixed results.

As I said earllier Ady flipped an element, short of building a large scale Star Destroyer model (which was beyond his means back then but by ROTJ:R who knows?) that was all he could do.

Which is at least more creative than flipping whole shots which Lucas does again and again even in the PT.

If you can think of ways to improve on this it would make sense to post them on the thread I directed to as Ady has gone on record that he won't be doing any more versions of ANH:R other people may and indeed are building on his work in other projects in various directions and leave your comments there may help those people produce a version that you are more happy with.