Are the savvy sniper slings cotton or ballistic nylon?
Good to know on the mounts -- adjustable windage is pretty clutch. I've been casually looking into what I want to run on my RPK and it sounds like your mounts should fit the bill (I run ambi safeties on my VZ2008 which means the side scope mount rails wont' work for me).
Have you looked into making a Galil scope mount? There's currently a huge market void there with only Promag making them and they fit neither the Century Golani nor the CNC Warrior scope dovetails w/o some fitting... And they are like the original Galil scope mounts which are sit to the top left of barrel... Still parallel but not ideal IMO. Also, the biggest detriment to the scope rails that have been made and function is that the dovetails fail if overtightened (especially the aluminum ones). So if you were to fab ones with replaceable dovetails, that'd be pretty awesome too. Essentially the way they function is a plunger comes through the dovetail to press against that receiver which pushes the dovetail out against the dovetail slots to lock in place. I would think you could couple a clamp like the the AKs onto the dovetail and still have a plunging mechanism to lock into place (blackthorne/akpartskits) makes ones that use a screw to hold into place on the dovetail rather than clamp but you have to remove your handguard to install, which is pain. Your rear biased base appears to fit the bill. If interested in looking into, I might be able to loan you an in the raw CNC warrior receiver and a couple of the scope mounts I have on hand. Oh, and FWIW, there appears to be some more Galil parts kits coming into the country this year as well from Central America per folks on the Uzitalk Galil forums (also talk of the Galil Ace being made here too, but they have a top rail). Most of what's currently been coming in are South African parts kits and their receivers don't contain the scope dovetails, just lightening cuts, in that position.