I dont think the point of his post was saying the nitrous caused it, the lack of a tune period did... like you said. Im sure spraying it on top of that didnt help though.
Although, I cant imagine not needing a tune for when you're spraying.. I already said I dont know squat about nitrous, but that just doesnt seem right. Oh wells... good luck, hope you get it back together. I know I'd cry if I broke mine.. Im just over 5K miles with mine too.