Yes.
You could then do the add to cart all at once and do a secondary check as it is actually added.
It would also need to check a users purchase history to ensure that they hadn't already selected a particular set of coordinates during a previous purchase. Would you be able to cover that in our Premium Support Ticket session?
Will just go and book that in with you. Would you be available tomorrow / Wednesday at all?
Thank you Ray.
Regards
NJ