The recommended cecal intubation rate in colorectal cancer (CRC) screening is 95%. The MEI system allows real time monitoring of the colonoscope position within the colon and is considered to be a useful supplement to achieve cecal intubation. However, the MEI system is costly, and trial results are equivocal regarding the actual benefits. A newly designed colonoscope (ColoAssist) with gradual stiffness throughout the colonoscope shaft has been developed to improve insertability. We want to investigate if we can achieve equal performance results with the ColoAssist instrument as with the MEI system in CRC screening. The study is designed as a two-center, single-blinded, randomized, controlled non-inferiority trial.