There are two Cradle Runners in every Archivist scanner. The Cradle Runners are 1″ square, 1/8″ wall metal tubes with 1/4 20 tube end connector nuts pressed into each end. They connect the Right and Left Lifter.
The picture on this page shows powdercoated Cradle Runners, but the scanner is designed so that they can be shiny, bare aluminum without any effect on the imaging module of the scanner. Kits shipped with unpainted Cradle Runners; the bars do not need to be painted but occasionally may need to be cleaned.
PDF Drawing of part:
STL File of Part:
DXF of all Wood Parts: