Daring derail set problem....help!

No worries. I've decided to purchase this set from amazon. They had one that was "used" with a slight imperfection. I'm sure it was just bought and returned to them. It sounds like the set in general has a lot of issues and often doesn't work properly which is probably why not many folks have one. I do remember the brief period before my son took it apart that it didn't really seem to work like it should. Regardless, we will see how this goes. My plan was to take one apart myself, get the one we have back together, and resell the extra set. I will take pics and post them on here for reference