I  just set up a layout with a hill and my KS-2 diesel all wheel drive will only pull 4 cars
 up hill. so I thought I would get another SD40-2  KCS diesel and put them together
and I could pull 6 or 7 cars up the hill. The two diesels pull power pack down and they
creep along, and the two units come apart at coupler sometimes. What do I need to do
to get more power from power pack and get more speed. There are 2 terminal tracks
in layout ( 8 ft X 4 ft ) How can I keep couplers from coming apart ? Is there a way to
lock them together ? I checked grade and it is 86" long and lifts 2 7/8". The wheels do
not slip on hill. The 2 diesels run within 2" of each other when run by themselves. The
power pack is 16 volt 1000ma. I think 2 diesel is to much for it . Found missing spring
on coupler.
                                                   Thanks
                                               Donald Geisers