Bruce, here a quick overview of what I do. My goal is to get the exact correct dynamic spine with a good amount of weight on the tip and a lot of drag on the rear. This concept will allow for great flight with a broadhead. It has to be tuned your bow, with you shooting it, if you want ideal flight. Here's how I go about it.

1) Pick a shaft based on the spine I think I'll need with my arrow length, draw length and tip weight I want. This takes some practice, so if you're unsure, get some advise before putting your money down.

2)If carbon, spine test the arrows and mark the stiff side. Cull any that don't fall within . 010 of the average.

3)Fletch a couple arrows (I always use feathers attached with a helical for greatest drag). Cock feather is put on mark for stiff side. Put tips on the fletched ones and a couple bareshaft ones.

4)Bareshaft test to get spine perfect. This involves adding/subtracting tip weight, changing draw weight and/or cutting the shaft on the bareshaft arrows to arrive at the ideal spine for that arrow and your bow setup.

5)Finish building the dozen arrows. When cutting to length, I cut equal amounts from both ends (most inconsistant part of the arrow).

6)Spin test broadhead to make sure they are perfectly aligned.

7)Practice like a man possessed.