That page you linked had a link to the US version of their site. It's tough to design a board around parts you don't have, and it's hard to order parts if you don't know whether the program has their profile pre-included. I still have 30 or so of version 1 to solder up and get ready anyway.

Let me pose some questions to anyone who would be interested in these things.

What would be your choice for making terminations to one of these? A pigtail, an 8p8c jack, screw terminals (most expensive option), or other suggestions?

Would anyone be interested in a model that had four loop detectors in one package? The parts are simple and cheap enough, getting the board designed is simple enough, problem again is what would be a preference for connections?
For the four way model I was kind of thinking 6p2c jacks for the incoming and outgoing lines and then I'd only need 6 connections for battery and A leads.

I'm open to thoughts.