Hello, Im a packer with around 3000 packjobs, and I always have the same problem while packing without a packing weight... with a packing weight everything is fine. When i try to get the air out of the canopy the lines tend to unstress, especially with new lines. I don't see what I'm doing wrong... i put my knees on just below the slider, tuck my arms under the canopy and let my bodyweight do the rest... any advice?? greets