Heat, oil and hands!
I prefer a bit of character in my arrows. Thats why I use sourwood shoots. If they spin true, usually they will fly true(if not, they become nutters with flu flus). For hunting arrows I don't want too much snake because it would impede penetration but for 3D and just shootin', "not so straight" arrows are fun...and shoot well.
I draw 26"(most of the time
) but cut arrows to 29"and that, along with the natural taper I can shoot shoot arrows that are 15# or more over spined and they still shoot well from my self bows.
Steve Parkers sourwood arrows, on the other hand, look like they were made with a doweling machine. Pat
ps. on severe bends or at the very end of the shoot I use an arrow wrench...a piece of wood(or antler) with an arrow size hole in it to be used for leverage. I don't like using one much because it leaves depressions in the heat softened shaft.