bet there is something on YouTube, I don;t go there myself, too old fashioned I guess, and I'm positive Bullseye from this forum has something on his web site, maybe he'll jump in....not that hard really and no need to tear it ALL apart, remove the upper from the grip frame and a look/see may tell you something right off....with the upper off the frame,you can put the mainspring housing assembly back "in place" to actuate the trigger/hammer ( lockwork) only thing you do not see if there are any issues with the bolt, canted in the receiver tube or any drag on the magazine lips, to the bolts underside........but you will be able to "see" and "operate" the trigger, and hammer and see how they are interacting, and the disconnector along the inside of the grip frame, smooth and easy travel....if you were sitting here, it would take a few minutes.......gosh I sure miss my fishing days from up north of the border, and I still refuse to get a 'passport',,,,,,, oh well Clean it real good, blow it out with an air hose or gun blaster or some such stuff ( we just use kerosene ourselves) then oil it real good,may just be 'gunked up' springs fouled in place, etc.........