What is your preferred quick extrusion profile size?

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!

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