The guys at my shop have said that the longer draw length (30" +) do seem to have a somewhat stiffer draw than the shorter draws with the Binary Cams. A friend of mine looked at the Old Glory with his 31" draw and didn't care for it. Hey, you tried it and didn't like it. At least now you know. You mentioned the limb was cracked, did that happen while you were shooting it? That may have contributed to some of the vibration you felt.