It would be a huge benefit to be able to have a separate .json config file for each Modbus or PLC source of data (individual devices).  At the moment a node must have all devices configured in one .json template.  This is troublesome because if one of the devices' tags or configuration needs to be edited, an interruption to the other devices in the .json file will be introduced.  I would imagine a separate config file and "session" for each device, much like there is a sender session for each OPC UA source or device.