Try this link--it's from the stickie with "useful links" (IIRC) in the title. Not the first one or the bugs one:

RTW longest routings [16 segments]

See what you can do, and be sure to post if you come up with anything awesome. I'm pretty happy with my DONE3 that is 54 and change.

Sorry, when I previewed my post, the link isn't active, so just go to the sticky and you can click on the active link to the thread from there.