Straightarrow, thank youvery much for the in depth reply.

I have started implementing some of the things you mention. Through a bit of trial and error I believe I now know the spine range for my rig (approx. 0.400 maybe a little less). I need to get some in this range now.

I don't have a spine tester but I really like working/experimenting with arrows. I suppose it would be worth getting. Any recommendations?

I have fletched (no feathers but have tried 2.5" quikspins, 2" blazers and 4" vanes)and bareshafted and that is how I determined the spine I think I need.

I have been cutting from both ends. After spin testing bare shafts I came to the conclusion that you mention, The straightest (most consistant)part is in the "middle".