<qa>  What arm will be in sealed envelope?There will be two arms to the study, the CF-H180 adult colonoscope Control Arm and the Olympus Technically Improved Colonoscope Olympus. Control Arm. In this protocol the investigators will randomize patients to either the adult colonoscope or to the Olympus Technically Improved Colonoscope Olympus arm. The name of the arm CF-H180 adult colonoscope or Technically Improved Colonoscope will be in a sealed envelope and opened by the nurse. The endoscopist will be blinded to the scope that will be used. 