Overhead Trolley for CNC Vacuum/Cords LR3

I over engendered this trolley; so it’s quite tough and doesn’t require thick walls or infill for printing… The model requires three 608-ZRS bearings and three pins to be printed.  It mates to a 18.1mm conduit pipe. I recommend printing three trolleys for longer applications.  And I would also recommend sanding the conduit pipe with 220 then buff with a 0000 grit steel wool for best results.  The model tolerances are tight and may require it to be sanded for a proper fit.