I have both the A30 (non-Halcyon) and the A45 (Halcyon). I love both bags, but tend to not use the A45 because it pulls way from my back when I wear it. The A30, however, lies very nicely against my back. Does anyone else have this problem and if so, do you have a solution? I vaguely remember someone posting a similar issue, but can't find that post. I'm on the shorter side (5'3"), if that makes a difference. Thanks in advance for any tips.