A medical device includes an insertion tube, having a distal end for insertion into a body of a subject. Following installation of the bearing sleeve, the sleeve bore may be reamed to provide a uniform inside diameter. The upgrade versions of computer code are programs or subroutines of programs associated with a device selected from a group including, the consumable, the associated computerized apparatus, and interactional program code associated with both the consumable device and the associated computing apparatus. Generally, the method further includes increasing the air flow velocity, while maintaining the discharge temperature of the air flow to the selected value. The dispatcher can process both synchronous and asynchronous messages by dispatching the message to all registered subsystems in order of their registered priority.