I finally got arrows tuned to my bow. At least as near as I can with my not so great shooting. That is good enough for me. Here is some information that my prove helpful to someone.
Martin Diablo TD 35# I have a 28” draw.
Carbon Express II 2040’s 29” ,100 grn points ,4 inch feathers. These have a spine of about 623. Fletched and unfletched, no difference that I can tell out to 35 yards. At about 85 yards the unfletched sail above the fletched. I think this is the drag of the feathers. I have about a 3foot grouping at 85 yards. Not nearly close enough to shoot geese on the fly. ;-)
Carbon Express 700 29” , 65 grain points; 4 inch feathers. These are the same fletched and unfletched. With 100grain points the unfletched fly a couple of inches to the right of unfletched at 20 yards.
Carbon Express 600 with 125 grn points Unfletched fly 3 or 4 inches to the left at 20 yards.