I recently bought the superb Cambo SCX. At $250 it was a real bargain. Now I wou ld like to hear comments from all users and ex-users of this really rigid and ve ry well built monorail. What year was it built? (Ser.# 85046). Any problems? How about interchangeability with the current Calumet/Cambo line (i.e. for adaptati on to 8x10)? All information welcome.