I went over the directions quickly, they are translated from japanese so there are some of the finer details are lost in translation. I'll have to post it up, it's kind of humorous actually.
The tool was never used as far as I can tell. I was hoping to add threads to some existing prewar doublebutted spokes but according to the directions the spoke ends have to be rounded off first. If anyone has some NOS unthreaded double butted pre war spokes, let me know!