Thanks, Andy
Makes perfect sense.
I have used hierarchy filters for my attribute / text load (all the hierarchies in one step), but yet all the unassigned nodes are returned, so maybe I need to split that out in separate steps in the Package Link, so that should solve that issue. (I faced a similar issue with the hierarchy loads)
I guess the other approach, then, is a routine BADI, as you mentioned.
Much appreciated.
Nick