Ok, here' s the deal. My buddy wants me to make him some cedar arrows, but he is currently shooting carbons. Test shafts will be kinda hard, because he moved to Montana, and I cant " drop by" to have him shoot mine.

He is shooting a Bear recurve, 51#@28" , and his draw is 29" . He is currently shooting Vapor Carbonwoods, the specs on the arrows are 4000=55/70, cut to 30" .
I cant find a stinkin' conversion chart, even though I know someone posted the link here somewhere.

What spine arrow would he need in cedar? I am guessing here, but I think that would be a 60-65 or a 65-70 in cedars? Any help would be greatly appreciated.