I have read that Thomas Edison, after having tried 7,000 things to make a successful filament for the lite bulb was asked by one of his friends, well, are you ready to give up yet?  He responded,( remember this had never been done before), "Give up?  Why, I am closer to the answer than I have ever been.  I have found 7,000 things that don't work."  I think the company has found all kinds of things that don't work.  Hopefully, we are closer than we have ever been.  My best to all on this journey,  Jim  PS-Edison did not stop until he found something that worked.