This is a remix of Tezz's awesome 3-way corner bracket for 2020 bars.
I just extended and cut/flattened the base of the model because I couldn't have material underneath the 2020 railing in my case, plus it makes it easier to remove supports (if you need supports). And then of course I also made a few variations of it (like a straight corner and a T).
PS. Be sure to check out the new facebook group called "3D Printing Useful Things!" - where you can find lots of other useful 3D prints :)
I would do 50% or higher on full honeycomb