Very nice!
I especially like the side-cocker for the rifle. You should be able to un-cock it by holding the lever all the way down and pull the rifle trigger, then let it up slowly. I would have that butt stock glassed to the receiver and the scallop crack fixed. The 7X65R isn't a real light round, and a 16ga can pound a stock, too, with the shorter forcing cones in these guns.
I believe Greifelt got his receivers from Sauer, but I'm not sure on that.
You made a good choice.