A fluid cylinder block includes a body having a plurality of bores formed therein that intersect at a junction, and a stress distributing joint comprising a groove formed in the body adjacent opposing bores of the plurality of bores on each side of the junction, wherein the grooves include a major dimension that is greater than a diameter of the opposing bores. The service orders generated by the service order control system are monitored to identify service orders that require a dispatch. Foreground candidates are further checked for vertical or horizontal symmetry, and symmetrical windows are classified as face candidates. The implant may include radiopaque markers extending through the thickness of the implant to indicate the location and size of the implant. The reaction chamber preferably consists of a plurality of separate reaction compartments containing a catalyst bed and a heat-exchange system for exchanging heat therebetween.