jmac_or:
I know what you are talking about, Len's Tuning Trilogy-tune the bow, arrow, and archer. I can assure you the archer needs the most tuning!
I have, however, always believed the the arrows were very important, moreso than the specific bow being shot. I see lots of guys spend almost $1000 on a bow, sight, rest, etc. and then scimp on the arrows.
By joining a club last year, and getting to shoot more at long range than I have in some time (I used to live on 6 acres and could shoot to 50 yards daily, then the wife and kids wanted to move to town[:@]) I know there was improvement. Just have to rededicate to get better.