Hi Robert. Here's a few pics of a friend's rifle I rebuilt about 3-4 years ago. He opted to use the JLD style rails instead of Ralph's (RDTS). As you can see the top edge of the welds are bigger. The reason being the rail does not touch the top surface. If you're gonna put together a nice looking and shooting rifle, I'd go with the RDTS rails.
I'm not sure if he's ever put rounds through the gun since it was rebuilt. Oh, by the way...the trigger pack was sent to Bill Springfield for a trigger job. The pack came back in a week. Very noticeable difference.