Despite the advantage of saving space, the Z-Rack did not seem to be able to replace the normal rack for a number of problems. Anneliese targets analyzing and revising these to bring Z-Racks to the quality standard of an established rack cart.
Frame: Improved with double Z-struts on top
Material thickness of the trial frame: 5 mm
Tube construction: Enhanced material thickness of the framing tubes to 2mm (usually 1,2mm thickness)
Wheel mounting: Internal wheel, easy to access screws, easy to clean
