I tired this out today with 6tbsp of root and ~1-1.5 cup of water in a large ziplock bag based on Piper's video. I ran into this problem, as you can see below. The water/root mixture seemed to 'bunch up' the bag at one end. I noticed that in the video that PM posted, it showed what looked like either a smaller bag, or more root/water (or both). Because of this, the method didn't really work because I just pushed the mixture towards one end of the bag and then couldn't roll it anymore or it would burst. What am I doing wrong?