Its been done. Sorry I don't have a link. I think the person who did it somehow took off the back clip and the whole led array came out. I think he had a hard time getting everything back together again.
I just bought another Survivor LED after selling it many of my other non cree lights. I do not think I will have it modded though. I believe it is one of the most industructable lights I have ever owned. I never worry about it fireing right up when I push the button. I love my cree lights, but If I had to go into a dark cave, I would want it as backup to my Chinese crees. None of which I would want to bet my life on.
If you get a D-mini, you will have great throw and a brighter spillbeam, but I would still keep your survivor.