Feet carry the load.
Profiled end seats and six chamfered intermediate bearings pass laptop weight into the shell perimeter and its integral feet. The bridges sit at quarter intervals of each inlet slot, with 1 mm chamfers in both sliding directions. All laptop contacts are printed directly into the shells; no liners or hinge seals. Printed feet work bare, with desk-grip pads optional. Separate ribbed bottom covers close the duct. Together they use about 94 g of PETG, 48% less than D7. The loading end and underside intake remain clear.