An interconnect assembly including a resilient material with a plurality of through holes extending from a first surface to a second surface. Structural members each partition off a space between nearby image forming cartridges mounted to the apparatus body. Another embodiment of the invention comprises a system and method for enabling propagation or inheritance of test executive sequence local variables. At each node, the electrical signal is supplied from a customer interface. Subsequent single or multi-user precoder can be applied in concatenation with the SIC precoder to transmit signals to one or more users while receiving signals from one or more users simultaneously over the same frequency band.