FasTrack Manual Switches - Non-Derailing, Spring switch, etc.

The spring is supposed to be an overrun spring, taking the throws(switch stand) with the points, to the last position and locking the points rather positively. I am surprised that none of your switches do this, as all of mine do. Can you post pics or video of what is happening?

A few pictures attached.  While the points will stay closed under traffic when manually thrown, this is what happens when equipment goes through the switch in the converging direction with the points lined for the opposite route.

I have also attached a picture of the spring, which seams rather anemic... 

I stretched out the string a bit to provide more tension...

All that did was cause a light car's trucks (PW SP Caboose) to lift when passing through the points lined in the wrong direction. 

This issue is common to the 5 switches I picked up, from two different sources.  inspecting the design of the linkage, it seems that the geometry of the spring linkage has a "neutral" spot at the center of the throw.

Jim Harrington posted:

... inspecting the design of the linkage, it seems that the geometry of the spring linkage has a "neutral" spot at the center of the throw.

 

Maybe, but all of mine lock in the closed positions at each end of the throw, there should be no reason for them to come off of the closed position.

If you think a new spring would help they are available. 610-2017-050

I realize this topic is over 2 years old, but Jim Harrington, did you ever get a fix for this problem? I expanded my layout to allow for passing trains and meeting trains in the opposite direction and one of my 0-36 Right Hand Manuel switches is doing the same as yours. It doesn't derail everytime in facing point movements but probably higher than 50% of the time. Many times it is not the Locomotives that derail, but a one of the first few cars.