Nice job as always. I like the fact that the Linch system isn't permanent and can be easily transferred to a different rifle if I ever wanted to change things up.
It's too bad that side mounted optics will get in the way of using the left-hand charging handle, but it is good to hear that it will clear some mounts and allow right side charging.
You have a terrific way of making me want to turn my "cheap AK" into a money-pit hot-rod. :)