Mossy
I dare say the problem is form not arrows.
What usually happens the faster the arrow is going minor form flaws become more evident.
I would stick with the heavier arrows and work on my form then when you are grouping well try the carbons.
I think that if you switched to carbons now you would more than likely be worse off.

I cant believe I just said to stick with the heavy arrows<img src=icon_smile_tongue.gif border=0 align=middle>
Arthur would be proud of me<img src=icon_smile_big.gif border=0 align=middle>