Bendtrack is simaler to (and IMHO, better than) N-Trak, but it's quite different. 2-track mainline on either side of the module (4 mainlines in total) on a 2-foot wide module, with 2 sets of 2 tracks near the outter edge of the module. It's hard to explain briefly, and i don't have the link handy, but when i do, i'll post a longer explination.
Later
AR