I recall having issues with the sculpt of the mount, and it still looks off-balanced, but you breathed a lot of life into it.
"A pretty good match although a few areas are somewhat improved."
Amen! A very noticeable 'somewhat improved.'

I favored the Koralon, but just for other genre uses; this is spot on.
"the only 'big shoulder pad' models from that time that still work for me"
Fair's fair, they 1) aren't that big, and 2) these don't cover the joint between arm and body the way the big uglies did.
Still, more pleasing to the sensibilities, one hundred percent.
Doug