I talked to Jack Sobon about them, and he suggested that I make them basically identically as I did for Jim. He said he had about 40 of them. When asked how many he has used at once, he replied "All of them". The problem I see with the long taper and one size fits all is that it is a lot more expense for the material, and a significantly longer time to draw them out. This would make them more expensive. I have 3/4" stock, so that is what I'll make the first batch out of. I'll see if I can scrounge some one inch, and see how long it takes to make one.
