I was fitted for my AP1s in late-Oct. 2011 at a Titleist Fitting Studio in Northern Va. I was given "Std" Loft and Lie, 1" over NS PRO 105T shafts. From the time of my fitting until two weeks ago, I hit my irons predominantly left of target and had toe-ward imprints on the irons. I recently got refit at a non-Titleist facility and we found my lie was "Std" and my shaft length was "Std." with a 6-iron (37.5"). As a consequence, I modified my shafts to shorten them 1" and now my swingweight had changed dramatically from D-2 to C-3! I put lead tape behind the heads to increase swingweight, but the amount of tape is "massive" and I only have the s/w up to C-9. How did this happen? I understand the iron head was "custom-made" to adjust s/w to the shaft length of my initial fitting, and by shortening the shaft, I decreased the s/w. How else might I modify these irons to increase s/w? btw: my iron ball striking has improved dramatically; ball imprints more towards center of clubheads; ball trajectory is higher and distance a little less than before the changes.