Here are a coupe of pictures of progress on the 700 NE that I am making.
This is the set-up that I used to cut the internal radial surface for the under-lugs. After squaring the holes I pivoted the receiver on the hinge pin against the broach:

Here are the finished slots:

I should be finished with the machining in a couple of weeks. Then I'll start all the hand sculpting.

I'll keep posting the progress