Hmm, Switchback this seems to be a perfect challenge for your incredible, innovative creativity! https://www.innocentive.com/ar/challenge/9933048?cc=PopSci9933048&utm_source=popsci&utm_medium=pavilion&utm_campaign=challenges Greg Hummel "If you were born blind, a butterfly would be a fairy, a flower a miracle, a tree infinity. . . and thunder- GOD!"- GNH