Ah, well done Dave, I realise what he meant now :teeth: Yes, the labelling of Expansion as opposed to 1.10 Expansion won't change. Which is good, because it helps us catch some hacked items. "Expansion" items can still be used in 1.10, but you will always know they came from 1.09.
I thhink it's before, if you put it inside the actual weapon. When you put it in, the ED for that particular weapon would raise by that much, and weapon damage is used as base to calculate the dex bonus (say it's 100% before, you put in a 20% ED jewel, it would become 120%), works same way as ohm rune basically.
Just from personal experience, not from the game code.