Nice work Brian. For sake of clarity regarding the trigger plate screws, the one that is scored across the tip is the Left screw i.e. it is "supposed to be" on the same side of the gun as the left barrel. When removing, the mind can see it as the right side but I have to remind myself everything is "upside down" when removing them. In some earlier guns the rear center screw is the same length as the right and left. On those rear screws, there is a + scored on the tip. The unmarked short screw is "supposed to be" the right screw i.e. under the right barrel. All bets are off with non-original screws, so if all is properly indexed, I would place them individually into a pill bottle and mark the bottles. I've also learned to never say never and never say always but...
It is important to remove the plate as you describe using a dowel or nylon punch through the frame slot. I have seen messed up plates where someone tried to pry it off - ouch.
Figure 2 in this old instruction sheet I have, shows the dowel and where to insert. Maybe you could make one more pic, showing the dowel/tap method.
Thanks for your great work on this album
Cheers,
Jack