Only write the collimator/element name when printing, not the full null filled array.
Only write the collimator/element name when printing, not the full null filled array.

SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack