My housemate has stepped up and will be handling the production work on inserts for me. I am not sure of his timetable, as he must continue taking care of other things in his life, so please do NOT as when what will be finished...
I know that there is about 12 .680 inserts being worked on.
I have asked that he get a batch of .675 and .670 inserts finished next.
He has suggested that he can produce a prototype of a .665 insert... Though I don't believe there will be much call for anything that small.
He has also suggested that I look into .685 inserts. I will consider it in the near future.