I do use families, but when I've finished working on a group I default to grey otherwise I'd run out of colours..................I also make sure I put a title in the groups, like 'Buffer Assembly' or 'Smoke Stack Assy'. This helps a lot later when I'm adding other pieces.

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster

And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...