Are you using the Gargraves switches back to back? If so put a section of straight track(one to two inches) between the two switches and supply power to both outside rails because the Gargraves switches are not designed well for electrical contact. I have Gargraves switches and had to supply power to the outside rails as the one rail is plastic from the frog to the end of the switch. A cure when using the anti-derail feature for Gargraves is to move the section of track that activates the anti-derail to one or two sections of track after the curved section of the switch.
Some older Gargraves 072 switches loose power to the center rail, as the center rail power comes in the one side and stops at the switch(no connection) causing you to wire any center rail after the switch both sides after the entrance of the switch.
Personally I wish that Gargraves would issue an instruction manual for use with their switches or have a website FAQ for their switches and problems.
Another track system that needs an instruction manual is E Z Streets and Super Streets.
Lee Fritz
