Scissor pullback help!

I need some help with a ballista pullback system I'm developing. The whole system seem to bug out when I'm using it. I don't know If I've done something wrong or what it is. I'm on my phone atm so I can't upload any screenshots but I've painted pics of how it's supposed to work. Someone have any ideas how to make it work properly?

Pic 1 is starting position
Pic 2 is final position
Grey = blocks
Red = steering Block direction
Cyan = brace

Attached Files

Ah no matter! Got if fixed! opened it up and realized that 1 hinge was flipped xD
Was tired and missed it when I built last night!