Here are a few pictures of small progress.
I'm Still working on the top pin bosses for the arms.
Made the slug in the lathe.
lathe1.jpg
Then fit it to the bored hole.
toparm1.jpg
I Machined a taper for the welding.
So, the weld penetration will be Ok
toparm2.jpg
#1 side fitted
toparm3.jpg
Working on #2
toparm4.jpg