I need at least one more - should I buy another LeGrand for compatibility? Or scrap it and buy better units?
There's no mention of it at http://wiki.diyfaq.org.uk/index.php?title=Consumer_Units
In 2004 SJW wrote here that Tenby and LeGrand are poor, MK Sentry, Square D or Hager Vision are recommended
but in 2004 Syd Brittany wrote here that they are good quality.