a tubing cutter is not really the choice for aluminum shafts.They can make a shaft look like a fat lady in a bikini if you aren't careful
You could, if doing small amounts of shafts use something like a dremel tool, if you mount it and rig up a way of making sure the cut is perpendicular to the centerline of the shaft.
Components that have to be put in the shaft at both ends... require that they be mounted perfectly straight in line with the center of the shaft to achieve good flight.
A slightly off center cut on the shaft equals problems getting it to fly properly. You can have all kinds of funny stuff going on along the length of the arrow, as long as the nock and broadhead are aligned with one another it should fly well...but get a broadhead seated a little cockeyed and watch out...its a tomato stake!