Noddy, you have my sympathy and understanding. The few times I go through the puzzle with no mistakes, I feel a surge of pride then suffer from the realization that is was, most likely, an easy puzzle.
Boidy, the Denver paper has the answers but I'd rather not finish than refer to the answers--and I have to admit that when I do refer to the answers, I tend to do a little extra looking, so I try to stay away.
I'll let you know the next time I'm stuck.