If its a Bernie box then it will have whatever ratio's specified at the time of building it, if you asked for stock RST ones then that it what you would of got I would think
The CTS box's are no different to a normal BC box at the end of the day it's only the bearings that are bigger, everything else is still just as weak, unless you got the Stage 2+ which is shot peened of course, but that would be around £1500.