Lee>...and feel entitled to back out subsequent improvements. I just don't know how it could be done. Without prejudice, please note that this is already what Marcello's rewriting tools already do. DP puts in "precious" improvements over the txt70, such as page numbers, which the people who put in those page numbers are very vested in, because trust me it adds a ton of work, at least if you want to get the page numbers "right", and then Marcello's code throws away the page numbers -- at least on mobi devices where the typical DP page numbering scheme really really doesn't work. [And the DP scheme for turning off page numbers really really doesn't work either.] Also, people submit well-intentioned HTML which include helpful comments for future developers, and which retain the line-breaks of the original text, so that someone in the future can go back and re-proof the book against the original, and then the WW'ers "improve" the text by running it through Tidy, throwing away the original line-breaks and the hard-won comments which the original HTML developer had put in to make life easier on future developers. So, what one person consider a gift to PG and society, others consider garbage to be removed. Welcome to modern society. If you have multiple people partying on literally the same file you have to expect and live with the kinds of edit wars one sees on wikis, and someone is going to have to eventually traffic cop, and distinguish "honest disagreement" from truly malicious behavior [and please note the continuing disagreements about even *that* major distinction even on this minor forum!]