I have an older 110 pre acutrigger flat back rifle that is just under 2lb. trigger pull.I am setting up a newer flat back 10 that has a 4 lb trigger pull as the best I can get. I was wondering about changing the triggers?? The one with the sear adj. is diffrently shaped than the nonadjustable mod. 10 which causes concerns about safety working . does anyone have experience with a trade like this can I just swap triggers ? Can I swap the whole units?? Thanks for the advice in advance.