Yes, this bridge is the trickiest bridge of the entire movement. A lot of things have to be taken in to account. First of all the hammer spring needs to be removed. Otherwise all the parts will fly across the room. Besides that you probably have to reposition the tilting pinion, hammer and clutch before placing the bridge back on. If you've never done that before and don't have the right tools, tweezers etc. you will have a hard time getting it back together. Go for it if you have nothing to loose. Otherwise have an watchmaker look at it.