I created a little tool that scans a .map file for texture scales. You enter the minimum and maximum allowed scale and the tool writes a report for you, showing which brushes (ordered by entity) offend those scales as well as a little more info on how to use this information.
Usefull when you get the annoying 'Bad Surface Extends' error. Here's the download
Some may have seen it already, but I think it could be usefull to others as well: