I know this is later than your original post but, I bought a used Optima Pro and did the same thing. I have spent days looking for schematics for the trigger and have little luck and seeing that most forums complaining that CVA would not help. Now that BPI has taken over it seems thing are going better. I emailed BPI customer service and they responded quickly with a schematic, which I have attached here. Hope this helps and thanks to Jason at BPI Customer Service.