Wow that is beautiful. I would love the digital file for review. Thank you for offering.
Well I'm in shelter-in-place mode and needed a break from work so I got started. @alademann if you are willing, this is what is unclear to me (below). Of course if you already have a solid model, if you are willing to share that would be much appreciated.
In the image,
Can't quite figure out what you've done on the back side; this is where pictures would help the most.
This is the old front mount, it will be removed.
jb70's mod has a axle 5 preventing a blue pin here, I will figure that out...
Haven't done the other side yet.
Thanks for any & all hints.