Using your ET750 tracks from the year before, I ran it solo about 3 months ago. Lots and lots of changes starting outside Livingston; locked gates, road grown over to pasture, fence erected, etc. Further on a bridge out and twice through Sabine NF road closed. I went around though and able to off road around to bypass (both dirt covered culverts washed out creating ditches). I planned to document and update but there was just too many.I put the ET750 track together. It's basically the ET450 joined to the Huntsville West Loop.
We did it in two days. http://www.twtex.com/forums/showthread.php?t=93873&highlight=et750