i have a 3rd model da .38s&w top break and i am trying to put a new hand and spring in it but cant get it to slide backwards past the frame enough to get the old one out and cant get the trigger guard off to take it out the bottom.ive got all the pins and all the parts from the hammer back out.heres some pics to see if im missing something.does anybody have any ideas as to what i need to do?any help would be greatly appreciated.thanks