My printer stand is built from extruded aluminium ftubes and plastic corner joiners. All available cheaply at Bunnings.

When the printer gets up to speed the while stand sways back and forward.

These brackets make a huge difference in reducing the sway caused by the flex in the plastic joiners.

The honeycomb pattern is achieved by removing the top and bottom solid layers in the slicer settings,  exposing the infill.

https://www.bunnings.com.au/metal-mate-25-4-x-25-4-x-1-2mm-1-8m-connect-it-anodised-aluminium-square-tube-with-lip_p1138408