Does anybody happen to know where to get/have a modern survey for Jackdaw Hole?  The only one I've been able to find (1939) has the streamway stop at a section which is 'Too tight', however at some point since this has been blasted, and you are able to continue on to the Sump.

I'm particularly interested in where the Sump sits in relation to the entrance pot, but any information at all would be appreciated 

There  is a survey in Caves of Clydach.

Looks as if you're going to have to survey it yourself, Dave.