8020 Aluminum T-slot Building Systems

Any tips for T-slot cart building? - Do It Yourself 8020 t slot Order 8020 T-Slotted Extrusion, 10S, 72 Lx1 In H, 1010-72 at Great prices & free shipping on orders over $50 when you sign in or sign up for an 8020 t slot I am looking at either 1x1 80-20 or 30mm x 30mm bosch or item I understand fasteners are even more but i just want to know a ball park figure

noname slot 8020 aluminum extrusion sold by F&L Industrial Solutions, Inc in San Diego County, California