Interesting idea to raise one of the DIN rails. I'm far from an expert on this but am wondering if having most of the earths going to the lower DIN rail makes that your main earth star point and having the island of earths on the raised DIN rail give the potential for loops / inductance (if that is the right term). I see you have an earth block on the raised rail, plus the earth wire going down to the main star point, plus the parallel earth routes through the all-thread. This doesn't quite seem right but definitately one for an expert opinion . . .