I think I know what you mean, now, Taki. I think what you were saying is that by butt trimming, say, 2.5 inches, the diameter of the shaft would be reduced so much that the shaft would become that much softer. As I say, at a 8/9-iron length, I don't think we flex the shaft that much anyways. Also, I just measured the shaft and it must have a long "parallel" butt section because I just measured down 2.5" on the longest shaft (that's about the amount I'll need to take off) and the butt still measures 0.629" at that point (with a wrap on it). FYI, these are Aldila Tour Gold iron shafts.