I just got my 14 year old son a new Fred Bear Element. With the poundage turned down to a tad under 50 lbs, he is able to pull it OK at a draw length of 29". Now I need some arrows. Generally speaking, am I better off to go with the light carbon arrows (7.9 gpi) and 100 grain heads, or the slightly heavier A/C shafts and the 75 grain heads? I'm leaning toward the light shafts and the heavier heads; but I shot a few of my buddies' Eastman A/C arrows with 75 gr field points and they produced a very good group - despite the spine being considerably too heavy for this pull weight.