Just trying to get some of the old archived expansions done I've put chrallan's rules into the carcassonnecentral rules template. Its such a simple expansion it doesn't look like much on the page but I think this is a great addition to the Tower. Please offer edits, suggestions, corrections, etc...
It seems like there is real potentional for interaction and additinoal bonus points with the Black Tower fan made expansion here but having never played it (only having read the rules) I wouldn't feel qualified to define their interaction. One thing I know would need to be considered is the white tower pieces that cap off a tower and how that would interact here. My thought is the centinal should only go to the tallest tower capped by a follower, versus the person who caps the tallest tower with a white piece.
Rules:
http://www.mediafire.com/?djmkdbd35v4gq2nMeepleater, you made the graphic so I hope your still out there somewhere and can post a high res pic we can have along with the rule download.