So there are some places here in the high country of Colorado 400 feet will not clear the canyon. What do you do, put the altitude ceiling above 400 feet? Really is a problem where I live. Here is 8000 feet above sea level and 400 feet above ground level is not sufficient. To fly to a nice mountain top would be 12,000 or 14,000 feet, above where I am at 8000 well that is a good 2-4 thousand feet, not 400. How do you reconcile that difference? Just wondering?