I did originally design the system using Service Broker Queues, but that just added complexity without functionality, I finally realised that KISS applied, and stopped trying to using SB Queues just because I thought they were cool, and used a number of Agent jobs instead.

You can get back as many rows as are returned in the OUTPUT clause, the processing I was designing only handles a single row /value at a time (RBAR by design), I suggest you try it, it would be easier than trying to explain!!