Example apparatus and methods to communicatively couple field devices to controllers in a process control system are disclosed. The presser member is part of a head that is attached to the creel of the machine by a wrist that provides movement about yaw, pitch and roll axes with respect to the creel. The method may also include forming a first recess in the fin having a first width and a first depth and forming a second recess in the first recess having a second width that is less than the first width and having a second depth that is greater than the first depth. The request message includes a host identifier having a first portion that identifies the server agent to the public network and a second portion that identifies a server located in the private network. A hard disk drive includes a plurality of alignment marks arranged for alignment of a chip on submount assembly with respect to the slider, and at least one shield arranged with the plurality of alignment marks.