Mailed the supplier to ask, they said "Oops" and sent a pair of new ones... Then both pairs arrived. Not sure in which order, but anyway the first-sent ones had apparently got stuck somewhere in Finnish Posti and/or Customs. Phoned the supplier to ask if they wanted one pair back, was told not to bother.
So, sorry Rand... That little anecdote yields no useful advice either way; doing what I did might or might not have the same result I got. All told, probably what others have said: Don't nail them up anywhere for a while yet, in case they get in touch and want them back within the next month or whatever period you find appropriate. After that, they're yours.
So, sorry Rand... That little anecdote yields no useful advice either way; doing what I did might or might not have the same result I got. All told, probably what others have said: Don't nail them up anywhere for a while yet, in case they get in touch and want them back within the next month or whatever period you find appropriate. After that, they're yours.