an outer tube having an outer tube wall, an outer tube proximal end, an outer tube distal end and an outer tube lumen extending therethrough, said outer tube characterized by an outer tube distal segment, an outer tube proximal segment, and an outer tube middle segment located between said outer tube distal segment and said outer tube proximal segment; and

an inner tube having an inner tube wall, an inner tube proximal end, an inner tube distal end and an inner tube lumen extending therethrough, said inner tube characterized by an inner tube distal segment, an inner tube proximal segment, and an inner tube middle segment located between said inner tube distal segment and said inner tube proximal segment;

said inner tube disposed within the outer tube such that the inner tube distal segment is disposed within the outer tube distal segment, the inner tube middle segment is disposed within the outer tube middle segment, and said inner tube proximal segment is disposed within the outer tube proximal segment;

said inner tube being longitudinally fixed to the outer tube proximate the distal end of the outer tube proximate a distal end of the outer tube distal segment; and

a hub affixed to the proximal end of the inner tube and outer tube, said hub operable to tension or compress the inner tube relative to the outer tube to cause bending of the outer tube distal segment; wherein

the outer tube has a first plurality of laterally oriented slots extending partway through the outer tube distal segment, wherein said first plurality of laterally oriented slots are aligned on one circumferential side of the outer tube thereby defining a spine running along a side of the tube opposite the slots;

the inner tube wall has a longitudinal slot that divides the inner tube distal segment along a longitudinal axis, into two axially oriented parts which are connected at the distal end of the inner tube, and one of said axially oriented parts includes a plurality of flex enhancing cutouts dispersed axially along an inner portion of said axially oriented part;

the outer tube middle segment has a second plurality of laterally oriented slots extending partway through the outer tube, said second plurality of laterally oriented slots being non-aligned circumferentially; and

the inner tube middle segment has a third plurality of laterally oriented slots extending partway through the inner tube, said third plurality of laterally oriented slots being non-aligned circumferentially; wherein

the second plurality of laterally oriented slots are arranged in a repeating pattern of two differently oriented slots dispersed along the outer tube middle segment.