Well it seems that this thread has quieted down. I guess not to many have had a problem with a loose screw.
I explained before mine was extremely tight when I first bought it and have hand tightened it since with a six inch long Allen wrench.
I put 200 rounds two or three times a week through it and have never had either the take down screw nor the barrel screw come loose yet.
It's a nice, accurate and fun gun to shoot.