Thanks Paul.

That does make sense but I'm wondering what happens to the original records (each individual set of dates) in the table. Does the modify process overight and/or delete the original recods?

e.g If the original record is -

01/15,02/25,03/04,04/21,05/23,06/18,07/03,08/30

and then we modify it to -

01/15,02/25,03/04,04/21

what happens to the individual record for - 05/23,06/18,07/03,08/30?????

Would I need a PRE modify_record plugin that deletes ALL existing records before adding the new individual modified records.

Do you understand what I mean??

Thanks again.

Simon.