Thanks for your input JM and Leary222
The concept that I am struggling with is ....
The user creates a new quoteline by entering the details of a room (for example) and then wishes to edit it again (before it has been saved to the database)
Or wishes to copy and paste that line, duplicating it - requiring a copy of the line details (room)
How can I know how the Quoteline and room are linked when the ID has not yet been created? - or is it perhaps not necessary to know?
Or are these two issues irreconcilable and require another approach.
Thanks in advance for your advice.