A system comprising: a board connection assembly that includes: a plurality of cable-free interconnection modules, each respective interconnection module including a printed circuit board plane board that is rigidly connected to at least one respective electronic device; and a plurality of connecting printed circuit boards configured to provide all network communication connectivity to the interconnection modules in lieu of flexible cabling, the plurality of interconnection modules being connected in a first direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective horizontal ties and horizontal loopback boards providing first-direction connections among the printed circuit boards, the plurality of interconnection modules being connected in a second direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective vertical ties and vertical loopback boards providing second-direction connections among the printed circuit boards, the second direction being perpendicular to the first direction, and wherein at least a portion of the board connection assembly is mounted to a support structure via a flexible connection. a board connection assembly that includes: a plurality of cable-free interconnection modules, each respective interconnection module including a printed circuit board plane board that is rigidly connected to at least one respective electronic device; and a plurality of connecting printed circuit boards configured to provide all network communication connectivity to the interconnection modules in lieu of flexible cabling, the plurality of interconnection modules being connected in a first direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective horizontal ties and horizontal loopback boards providing first-direction connections among the printed circuit boards, the plurality of interconnection modules being connected in a second direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective vertical ties and vertical loopback boards providing second-direction connections among the printed circuit boards, the second direction being perpendicular to the first direction, and wherein at least a portion of the board connection assembly is mounted to a support structure via a flexible connection. a plurality of cable-free interconnection modules, each respective interconnection module including a printed circuit board plane board that is rigidly connected to at least one respective electronic device; and a plurality of connecting printed circuit boards configured to provide all network communication connectivity to the interconnection modules in lieu of flexible cabling, the plurality of interconnection modules being connected in a first direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective horizontal ties and horizontal loopback boards providing first-direction connections among the printed circuit boards, the plurality of interconnection modules being connected in a second direction via rigid pairwise connections of pairs of the plane boards via a plurality of respective vertical ties and vertical loopback boards providing second-direction connections among the printed circuit boards, the second direction being perpendicular to the first direction, and wherein at least a portion of the board connection assembly is mounted to a support structure via a flexible connection.