Ah, I understand your wish, but why not... / #1686

Add a new function "addPersonToProject" and do this the other way around. Since you will split the user and company-list anyway, this could be a context function for the customer list.

May I ask some rough numbers like:
  • how many open projects
  • how many closed projects
  • how many tasks average per project
  • how many team members per project
  • how many clients
  • how many suppliers
  • how many persons
tom