Thanks very much Sean. Pity the assign action is not unique for each rule. I would like to see that ability in a future release. 

Essentially I am trying to send the same message to seperate targets using the same DTL but assigning a different value MGH or MGP to specific target  HL7 fields (e.g. SendingFacility). These values don't exist in the source message. Not sure if I can do this within a single DTL 

I know I can do it with multiple DTLs but I don't want to have multiple copies of the same DTL.

For now I would like to find a solution doing it this way but ultimately I think I will need to create a BPL to handle this effectively.  Thanks.