Any tips for T-slot cart building? - Do It Yourself

Build Material Question: 8020 vs Box Tubing 8020 t slot T-slot aluminum profiles are versatile framing solutions designed for all applications Build your next structural project with no welding required 8020 tslot 8020 modular T-Slotted aluminum framing solution

arthur pendragon slot 30 Profile 4 Slot 30mm W x 30mm H Aluminum Smooth Extruded T-Slotted Bar Extruded T-Slotted Bar Fastenal Sku: 0961287