Questions from Boston

Okay, my last full day in Boston and I feel like a stranger in a strange land. I think I need to ask some questions to get my orientation again, so let's see...

It seems likely, based on Happy's recollections, that Cate and Grant were two of the main protagonists when it came to the expansion and recruitment drive for Project 31. They were running things across the campuses of North America - tapes, for sure, but most likely people and fabrics too. Costa's songs are known to have appeared on the tapes, so there would seem to be some link between Grant/Cate and Costa. As one of our investigators so perceptively asked - is Cate Costa?

Also, are the instructions presented on the tapes Coasta's own, or is she relaying messages from a more central figure? Kosyra, perhaps, or Regan, or Searly, even. Perhaps the instructions are coming from 'Mr. Crafts', whoever that maybe (likely one of the 3 suspects just mentioned). Or is Grant 'Mr. Crafts' - we know so little about him beyond a connection with Cate and witness statements aligning him with the tape distribution?

Other thoughts - did Kosyra fund/design the guidestone projects? We know he was 'disgustingly rich' and that he works in construction (or runs a front company marketed as being in the industry); was 'R.C. Christian' his public go-between? Could be Regan? Could be Searly?

I wonder now about the mid-nineties disappearance of Regan and Costa, as proposed by the map found by the candian religious studies student when studying in England - where did they go and what were they doing all this time? Is their disappearance in any way related to the later mass-disappearance of all recognised members of the Soft Michigan core group? Which, in turn, makes me wonder about the couple caught on CCTV using Searly's library card - according to Happy, they would seem to have some historical involvement with the Project 31 (having been spotted on campus with infrequent regularity until the disappearances), yet are not recognised as being Cate and Grant. Who are they?

Other questions - how does Sad Sack tie into all of this, and what is the significance of the missing mixtape 'At The Haberdasher's Request'?I shall try to make a breakthrough before leaving Boston. The heat goes on...