A hydrant main valve includes a main seal elastically deformable between a first state and a second state, such that a main valve assembly may be inserted into a main valve elbow without removable valve seats. The preferred method includes orienting a plurality of conductive compliant micro-leads, secured to one another in parallel with tie bars and tooling, to align with a corresponding pattern of conductive pads located along the surface of an area grid array CSP. Aspiration cannula is inserted through cannula into body tissue and is manipulated to advance directionally through body cavity. The computer network includes both secured computers and unsecured computers, which are associated with secured nodes and unsecured nodes, respectively. The light-absorbing material may include a green wavelength-absorbing material that absorbs light having green wavelengths from 510 nm to 560 nm.