T-slot Aluminum Extrusions Vs Pipes and Joints

What is V-Slot ? V-Slot is an open source and high quality aluminum linear rail profile with an extremely smooth v groove on all 4 sides

Aluminum T-slot profiles are a modular framing solution for your 8020 project SAEfractional or metric profiles available in a variety of shapes and

aluminum extrusions t slot slot profiles and superior aluminum extrusion solutions Our comprehensive range of T-slot framing systems is designed to meet the diverse needs of our

aluminum extrusions tslot My question is - why use expensive extruded aluminum T-slot? I mean, for a CNC router it makes sense because you need sub-millimeter