Note that the measurements for the trunion I got are 1.614" wide, which happens to be 41mm.
I'm not sure if I am missing some parts or if I have spare parts. I've managed to figure out the assembly for everything except the few parts I've identified. So if anyone can help with the one pic I'd appreciate it!
This has tons of pics (about 60) so beware if you're on a slow connection...