Gary,
Thanks for the update.

I thought about mentioning turning the mount around as I have seen that done on other platforms. As to the cheek weld you can get a cheek riser from one of the manufacturers like BH or a place of your choice.

Since you mentioned the Ruger plastic I started thinking about the plastic guns they make--I may not like the ergo's of them but I have never seen one busted. So, I bet your thoughts are founded in actual proof.

To the extra mags, I see what you are saying only only needing three mags. It would be interesting to see if one of the mag loaders can be used or adapted to speed load the mag from M14/FAL chargers.

I had plan to do more reading and messing with this platform but when I ran across a Enfield Jungle Carbine I kinda lost interest. I may still get motivated to look deeper. I do know one thing is that if I ended up with one of the GSR I would be looking at a can for it too. With a can, it is a total system in my opinion.