Case studies ATK: 19cm CTO in SFA; Dr. C. Wissgott ATK: subintimal crossing of CTO; Dr. J. Rundback ATK: SFA bifurcation; Dr. L. Raja ATK: calcified mid-SFA; Dr. E. Armstrong ATK: severely dissected SFA; Dr. G. Adams BTK: mid-PT and ATK; mid SFA; Dr. M. Lichtenberg BTK: distal TP trunk; Dr. C. Wissgott