I do enjoy a challenge, but it's so much sweeter when you feel you have a chance of winning.
I just put all my tools away and cleaned up the work space. This is what I do when I am ready to BEGIN a new machine. In this case I have lost so much ground since I started that I think it would be best to begin again with step one and try to figure out what I may have missed and where I need to go next.
Sometimes it helps to get a fresh perspective.