Hi Mark and welcome.
Personally I feel that a current limiter may not prove as advantageous as some may think.
If it were to be set fairly high, say ten amps, to power a multi loco lash up, each with a couple or more motors, hauling a long consist of lighted cars, it may continuously deliver ten amps into a fault causing a circuit board to burn out.
What would be nice is a trip that is sensitive to sudden abnormal current surges and trips before any damage consequential to any fault occurs. A visible indication of the trip would be good, as may possibly be an adjustment of the sensitivity.