Why not buy shafts that have been properly made.I have a great idea. What if we take those Silica Gel packs and throw them in our pool cue cases? that would keep things nice and dry... right?
or
Go with CF shafts.
My shafts were finished at least 20 years after acquired as square lumber.
That makes my shaft wood around 40 years old.
They're still perfectly straight.
Don't do anything special other than keeping my cues out of temp extremes.
Mostly worried about heat.