Long overdue update: The accelerator facility where I have been doing these was sold a couple years ago. The new corporate overlords have just declared that they don't want this facility do do outside work any more, so unless we can locate another accelerator that will work with us, I won't be able to make these any more. I knew this was always a possibility, so if this is to be the end of it, I will be grateful to have been able to do it at all.
