That is a coincidence. I was just pondering the same thing for a bow I have on the way. Mine is going to be a Big Jim Mnt. Monarch 51@30". I have 2219s and 2216s in my bin. The 2216 is probably going to go over the GPI I was targeting. So after testing, I might get some 2117s and try those. But most likely it will need 200 gr or less on the front for stiffness. It seems like aluminum is always the most accurate shaft for me. It would be nice to see some glue in/glue on inserts made.Tedd