I'm glad you got it together.
But as far as simplicity goes, unless you are completely enamored by pinned FSB's, free float rails & the gas blocks that they require are much easier to install than to dick around with the stuff you are dealing with.
WOA makes a beautiful, very high quality & still rail with a good locking nut system for $140. ALG ( owned by Geiselle) makes a similar one for a similar price.
MM
