Hi guys, Probably some of you use quick extrusion profiles like 8020 profiles for tooling design. I have 2 questions for you. What size do you think is the most useful or what size you usually use for a specific application? If you have to choose between 40 mm x 40 mm profiles and 45mm x 45mm profiles for general applications witch one will you choose? Since 40mm and 45mm have similar mechanical properties, if you use one or other may be you have a reason why prefer one. Tank’s for your comments!