You're welcome. If it was helpful to even one person, it was worth the effort. ; )
Here's a link to Sam Davatchi's Page. It shows IN PICTURES what I described in words, and it really is a very nice presentation (he gets a few more cosmetic changes that I missed too like the suns setting in ANH).
It especially demonstrates the Lightsaber inconsistencies:
Covers all three movies, even THX! Check it out...