i make cane shafts and unless your going to sort through many 100's of shafts to match spine and weight you are going to have to tune individual arrows.
i cut them to what ever length i want then put a field point on to get the total weight i want. then because they are too stiff to start off with i just scrape and sand the shaft to weaken it. test shoot, scrape, test shoot, scrape and so on until they are flying really good. then add a stone point the same or similar weight to the field point you tuned with.
don't over complicate things. remember, cave men used to do it.