Additional rib work to locate and drill access through ribs for probe (5/16" hole/AN931-3-5, 3/16" ID), conduit (5/16" vinyl tubing 9/16"/AN931-5 for lighting/video), and antenna cable (RG-58).
Tried using small flute bit on router table to cut the rib edges. Found that the 4041-T6 aluminum stuck and clogged the router bit.