This circular setup looks incredibly cool. Your design as well as the original design, which I remember too.
It would look even cooler, if you could somewhat randomize the direction of the trains. First clockwise, than counter-clockwise, then a quarter, then half of the circle, etc.
May be you ...

Radial Kovarex
I saw a cool design similar to this and decided to make my own.
To use you got to make sure the red train is in the front, and then prime the cargo wagon with U-235. It should start working on it's own past that.

Radial Kovarex.png ...