I was hesitant as well as to pushing on the shutter curtains. But the camera sat around for a couple of months and I was pondering tearing it down to check the capacitors (I don't do this so it would have been my first attempt) and was fully expecting to end up with spare parts/boat anchor. When I was to the point when I thought it was just dead weight that was when I went prodding around and got really lucky.
I understand the hesitancy. Again, only if the shutters are jammed and you can clearly see that the edges are not straight up and down should you try it. If they are either straight or out of sight to one side then more than likely that is not your problem and you should NOT mess with something that fragile that is not broke.