I am trying to replicate a SA Only conversion on my 645. Gonna be putting a 745 slide on it. From what I can see the trip levers on the top of the frame on the right are removed and the trigger has the pretravel taken out with a screw. Any ideas on what else I need to do ? Without taking his gun apart I don't know if there is anything else. And I am having no luck getting permission to take it apart.