I started the quest, but I dropped the mirrors and stuff because I was not going to bother finishing it for a while (and you cant bank them).

 

a while later (aka, now) I cant seam to get the items back. I have the newly made crystal, but that's it.

help :(

Pull the collector lever

On the first floor(Second for US), all the way to the east there's a lever. What it does is reset all the mirrors and crystals you have placed throughout the dungeon. And after you reset it, you can get them back in your inventory by selecting the collect option on the same lever.

 

And another little note, I'd advise using a video guide for this quest, Specifically GoingCrazy201's video guides. Because she explains them very well. Just don't over think when she cuts the video, because she messes up a few times. And don't destroy any crystals you don't think you'll need, because you might eventually use them in current stage of the puzzle.

 

I did this quest a few days ago. In all honesty, it's not nearly as bad as people make it out to be. With a video guide, it was merely time consuming. But not hard by any means.

Tip.its guide is one of the better ones, especially if you use the special map it links too that shows exactly where the beam of light should be going; even if I do say so myself.

But yeah its a sod of a puzzle to explain in words alone, so if the map doesn't provide enough help a video guide is a god send.