[/QUOTE]Break? It's only half of the device. Unless you want to give them back quarters.

Do not forget what the Defectors tell you.[/QB][/QUOTE]
Actually I went down to the diseased ones after wiping out the cult, so it was too late to follow their request exactly.
Note I have never played this subquest before. Question: You do break the whole rift device in front of the diseased ones don't you? If you don't then nevermind.
If you do, I thought the game developers may allow a way to get the other half of the device even if you didn't follow the prescribed course of action. Just so you could free the diseased ones. Even if you didn't need it to kill the Beholder.