Large amount of work for little gain. Simply loosen the lever screw (don't remove if from the gun) and remove the side plate screw. Then just remove the right had side plate and you have full access to the ladle. Remove the ladle screw and fix the tab. One of the problems doing it the way you suggest is that the ladle screw only has enough threads to go through the thickness of the ladle. Most of the time you have to hold the ladle and push on the end before the screw will start. I posted some pictures of a ladle reinforcement in another thread.
Found the photo, easier to repost than look for the thread. Top, old style solid tab. Middle, bent tab ladle with broken tab. Bottom, bent tab ladle with tab reinforced.