8020 Australia: T-Slot Aluminum Extrusions

Has anyone ever built their own racks with 8020 aluminum extrusion? 80_20 aluminum tslot 8020 Aluminum Extrusions T-slotted flanged extrusions manufactured from extruded 6105-T5 aluminium; ideal for automation applications, machine guarding and 80_20 aluminum tslot 8020, 30-3030, 30 Series 30mm x 30mm Aluminum T-Slotted Extrusion T Slot Extruded 8020 Profile Bar : : Home Improvement

80_20 t slot 8020 for Wondering if any of you who have done the deep dive into extruded aluminum T-slot contraptions would have any general advice?