Anyone tried the Tonkin Cane Shafts from Kustom King?

Anyone

I am pretty sure they get them from David Knight at Primal Needs and ihave shot them they shoot good and are very tough and straight.I know several guys that have tried them and like them.I just finished building two with knaped points and plan on shooting me a tender little doe next week with a bamboo backed Osage I built.I have killed deer with bows I built before but never with arrow I made or a stone point my wife says I want be happy till I wear a loin cloth.the shafts I got from David are 496 grns and seem to be very forgiving spine wise.