8020 or T-slot aluminum extrusion stands?

8020 Aluminum Extrusion T-Slot Sysport 80_20 aluminum tslot Item T Slot Aluminum Extrusion Certificate and Standard ISO9001, ISO14001, OHSAS18001, Qualicoat, CQC Energy-Saving Products Material 80_20 aluminum tslot T-Slot Aluminum Extrusions 100% Compatibility with All Leading Most profiles are interchangeable with 8020 T-Slots and Bosch T-Slots, for

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?