Thanks for all the info! I will send you a confirmation in a few days after sorting out a few things. 

Actually, I do have a follow up question. If I want to keep a few people's keys, is there a way to do that?  Or would I need to re-send out keys again?

Some testers have been really active and helpful, and I'd love to keep them on the roster. Currently I'm just going through the forums writing down names, but it's quite tedious as often the display name is different from the actual username.