[bambam]

where in the book does it decribe horizontal hinging?

I don't have the book in front of me, but check 10-10-A/B/C

Some other book references I found in the forums:
2-G, 7-10 and 1-L #4

When that confuses you , do a search on the archives for hinge action and check out these videos:

Part 1:
http://www.lynnblakegolf.com/index.p...on-part-1.html

Part 2:
http://www.lynnblakegolf.com/index.p...on-part-2.html

And just in case that confuses your concept of the finish swivel, review this one again:

http://www.lynnblakegolf.com/index.p...sh-Swivel.html