Aluminium Profile 20x20 Sturdy Corner / Bracket

This is a bracket / corner for joining aluminium 20x20 profiles together. It's meant for the profiles sold here in Curitiba area / Brazil. I just discovered they are slightly different from other parts of the world (see the exact shape in the pictures). So none of the brackets I found here at Thingiverse would fit it nicely, I decided to make another one :-)

The openscad source is included. It's 25mm long but if you need it to be 20mm long you can set the "reduz20" variable to 1 on the source