RE: cutting off carbons
Use a Dremel tool with the cut-off wheel. Put a piece of masking tape around the arrow where you want to cut it, and mark it all the way around. First cut through the arrow 1/4" from where the final cut will be- this will allow for a perfectly straight cut. Then just make your final cut as perpendicular to the arrow as possible. It takes maybe 10 seconds per arrow. The only thing to be concerned about is to not let the arrow heat up. With the wheel on the highest speed, this shouldn' t be an issue- I' ve cut a whole pile of arrows (and fishing rods) this way.
Mike
WEAR SAFETY GOGGLES.