The present design has the holiday detector about 50cm away from the arduino. Also I am using a brush lead holiday detector that blinks an led when there is a problem. Would that help or do I need to keep it a bit further off ? I hacked the holiday detector by using the signal it gives to its led and am trying to make it a digital input.That is still a work in progress. I also wanted to get enclosures for the motors and arduino so that there is no em interference with the xbees . Would that be enough?