Like the others said,there are a lot of differences between cane.Something I've been doing the last year or so is ,cut your cane long,like 4'-4 1/2'.After it is dry,Measure the deflection along the lenght until you find the desired spine.I have 2 nails driven into a shelf board,26" apart.Starting at one end,lay the cane on the nails,mark the location of the unflexed shaft,then hang a 2 pound weight from the center of the section your testing,mark the new location of the deflected shaft,then measure the distance the shaft deflected.Example:If the shaft deflects .45",then , 26 divided by .45 =57.78# of spine or, if it deflects .3",then, 26 divided by .3 =86.67# of spine. This is handy, because with this method you can rough test the spine before straightening the shafts.After testing a few of your batch,you will have a good idea what diameter you need to fit your need.Then cut, straighten,and build arrows.Hope this helps. God Bless
