I'm not completely satisfied with how the merge/branch combo on the backstretch turned-out, but this should give you an idea of the basic layout of the track. I'm trying to match-up the centerlines of the segments at the branch/merge areas without messing-up the oval which I almost did several times. Perhaps I've gone a bit too far with this time since the only reason I'm building even the oval is to help with the mesh generation of Sandbox 2 later on down the line. Perhaps I should remodel the backstretch merge point the way I want it to look, and then just not release any of the configurations that use it until after I can model it properly in Sandbox 2. That would mean only 2 out of the 5 configurations would be available at first, but it might be worth the wait.