OK... The answer appears to be to define it as a NULL comment... And the order you CREATE them is very important... You can't go back & change things, because it appears not to work very well. You also can't seem to add DS's on the fly... Not particularly intuitive to me at the moment... But t's getting there...
Now...
Does anyone know where you define the OID for an SNMP query (indexed)....
(Sorry... Thinking out loud here. Maybe I'll solve it before anyone gets a chance to read this... or maybe not...