Ok, Got all the rest of the braces and gussets soldered to the boom. Now I need to glue the top pivot points for the A frame to the tip of the boom and square them up.
Then Remove and relocate the rear tabs on the back slope of the hull where the A frame stows into. Im debating using the metal castings as patterns and making them from brass like I did with most of the details on the boom. There are a few different types of rear brackets for the A frame, Some have a secondary attatchment point below the A frame spots for a big tow hook to drop down. As seen on the M32B1 on the back of the RR flat car here. So, need to ponder these options and do some research etc etc before I move on too fast. Also need to fabricate more padded lift rings for this early A3 hull. Sigh, I loath that work, it took me so long to get them shaped right on the Alco M4 build I just finished up. They are really tough to make but they do look awesome on the finished model since they look so different than the later bent rod lift rings.