Posted By:
robert aI think Pete's list is pretty darn good.
When you look at particular issues like E104 and E97 B & W, a lot of the examples that I see are just recycled over and over back into the hobby. They're very tough.
I agree with others that each issue has it's tougher variations like E90.
I have found E103 to be more difficult than E90-2, E90-3, and E97.
E97's lack of popularity hides the fact that they're pretty uncommon.
If the list represented which are the toughest sets to complete it might look a lot different but I think this list was intended to show how difficult one example is to find.
Rob