Note that a vintage Graflex will not have a screw holding the bunny ears in place, it will be a pin. The Graflex in the tutorial was likely a replica. The best way to remove the pin is what you said - very carefully with a small rod and hammer. I have damaged one of the three vintage pins I worked on doing that - so be careful! Unfortunately it's really the best way.
Second on the 3mm socket - a pair of needle nose pliers works well too, just make sure you have a firm grip of the base and then turn. If you don't have a good grip, the pliers will slip and possibly wear down the hex base. I've used the pliers method for all of my pins and it works fine. Just some very minor scratching from me not having a good enough grip before I started turning. 3mm socket is preferable though.
After removing the rabbit ears and brass sync pins, unscrew the red button and glass eye next. Then just take a rod and tap out the whole black plastic assembly with a hammer. If the plastic looks fragile or brittle...well be careful. I have never had this happen, but I read that someone broke theirs by doing this. It doesn't need to be smacked with the hammer or anything, just light taps.
Note that there are three small strips of metal that will likely fall out of the black flash assembly - this is okay, it's easy enough to get back together. They serve as contacts to the three sets of pins, and I like to leave them in for the look. Even if you use a blade holder in place of the flash assembly, you can still modify them to fit back into the blade holder so your blade holder will be more accurate. I also remove the pins from underneath the red button, because I like the feeling of that button depressing all the way, rather than hitting those contacts.
