The present invention carries out a desired image processing while using adjoining relationship between image parts. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The system comprises the assembly, a user interface configured for generating commands, a drive unit coupled to the actuating element and the other actuating element, and an electric controller configured, in response to the commands, for directing the drive unit to move the actuating elements to actuate the tool and drive the other actuating element to bend the bendable section. The ventilation openings are disposed in the at least some of the side walls so that when two or more outer containers are oriented adjacent one another, at least some ventilation openings of one outer container align with the ventilation openings of the adjacent outer container. At least one transfer circuit is in operative communication with each of the switch means of the at least two subcircuits.