I would love to work on this as have a 70mm EDF and 80A ESC sitting around. However, i am a little bit of a noob to scratch building and am doing another build so probably won't be answering to frequently.
I did one about two months ago. It ran on a 50mm edf but I’m abohf to rebuild it and now try a 55mm fan. It flew pretty nicely. And it should be able to be scaled up.
They were talking about an edf power pack, then they ditched that when John started to make the BDF jets, and I believe they had some issues with getting the housing units manufactured so I doubt we’ll see them released in the near future, if ever.