Giving credit to a great map that was posted here in 2011 (it's an old thread and I can't post about it there anymore).
This map · viewtopic.php?f=5&t=3289
Those who said the mapper "Helen" was unknown to them, and loved her work, "she" is the admin of http://birdieman.com/cgi-bin/yabb2/YaBB.pl
and has helped me on at least 1 of my map edits. She's also the one that fixed the broken tubes on 1 side of DM-HallOfGiantsExtreme.
Credit your good mappers when you can, they deserve the praise.