I ordered some bare shafts to fletch but after ording I have been questioned if 500 is enough spine for my set up which is 64" recurve, 32" arrow,31" draw 47/49 lbs at my draw. 125 gr point , 14 gr insert. Fast flight string. I am shooting 500 now but have never really bare shaft tuned etc , they seem to fly ok but I was told the fletched arrows may be making it only seem that way. What do y'all think?