A standardized Kagaku Colonoscopy Training Model (Kyoto Kagaku Co Ltd, Kyoto, Japan) in combination with an Olympus colonoscope, a monitor and a Magnetic Endoscope Imaging (MEI) Scope Guide (Olympus Medical systems Corp) is used. The Kyoto Kagaku Colonoscope Training Model is a phantom model in full-size of the human colon. The model consists of an abdomen model, a soft and flexible rubber colon, anal sphincter opening and an abdomen skin cover. The rubber colon provides a realistic life-like response, which makes the participants able to feel when the colonoscope stretch and bent the rubber colon. To reduce friction between the rubber colon and the colonoscope a lubricant gels is applied inside the rubber colon. By hand pump the anal sphincter is manipulated, allowing insufflation and suction. Six different cases with different level of difficulty are possible. We chose case 2 (simple layout, but a long sigmoid colon) and case 4 (a challenging layout, with a difficult-to-shorten sigmoid colon and a drooping transverse colon) for training cases. Case 3 (simple layout, but with a naturally formed "Alpha" loop in the sigmoid colon) is chosen for the final test.