If anyone has tried ordering a J-head from reifsnyderb, and always noticed that they were out of stock, I talked to him and got an explanation (which wasn’t quite on the website at the time): He’s got a lot of bulk orders because people who are selling kits for machines want huge batches. He is putting about 20-30 up on Fridays for individuals. So if you need a J-head, order it on Friday.
He’s also tossing around the idea about selling assemble-yourself hot-ends for those who need a j-head right now but aren’t willing to wait until Friday, but is worried about quality control and the things he might run into by offering that option. He’s currently got his hands very busy.