QuiltPath5 zone scale height issue

Has anyone figured out the best "zone scale height" (in settings) for a Millie 30 on QuiltPath5? Is it something I need to adjust every time? How can I figure this setting out before I start quilting and run into the "power loss" error at the bottom of my zone? I've played around with it, and I need probably a 93%-95% to work with the extra fabric and red snappers on my takeup roller. But there seems to be no way to judge if that amount will work for the pattern I choose on the other side of the quilt area. I wish QuiltPath would just tell me when I place the zone (in zone placement) that it's going to run past my zone scale height. Because then I could adjust my pattern height or nudge the placement up or something.