Method and apparatus are described wherein, in one example embodiment, there is provided one or more policy templates that may define a set of policy permissions or other attributes that may be desirable to specify in a policy. A lens holding portion is inserted through a barrel insertion hole, and then a housing holding portion allows a barrel attachment portion to be thereby positioned and held in a lens housing. In a second embodiment the clip includes diameter reducing tabs extending into lower arches of the clip so that the clip may hold larger diameter bars on top of smaller diameter bars. The cooling channels of the cooling system may include a plurality of protrusions whose configuration is based upon the cooling requirements of the blade in which the cooling system is installed.