Tennessee Dirt Devil

Any of you folks ever hear of  a route called the TN Dirt Devil?  Supposedly it's a mapped bunch of mixed roads that the DP motorcycle folks cobbled together - somewhere southeast of Nashville.  All public access.  

http://www.dualpurposetn.com/Trail_Details.html

The website looks a tad neglected.  A map is supposedly for sale for $20 - and I don't see any kind of internet map anywhere.  

If it's a real thing and worth checking out - I'll pop for a map.  

Some Jeep forums that I scoured tonight indicate Williamson and Maury Counties as the place where these roads are.  That's south and west of Nashville.  Thompson Station area.

I would definitely be interested.  Middle Tennessee gravel is too scarce to pass up.