I really like your solution!

Please add a permission so Technician only can see their OWN customer when they use Network Discovery. Today Technicians can see ALL customers Network discovery objects and everything else because they need to have FULL admin rights. That is a problem, you can't give some technician FULL admin rights only to use the Network discovery. Usually you have different technicians that only have access to some customers and they should not have FULL admin rights on the whole portal. Please add more granular control here, a technician should only see his own customers in the Network discovery and he should not have FULL admin rights.