The BEST 2020 corner - slightly modified

Small modification of the superb design by subcityzero. I merely decreased the sizes of the outgoing slots in order to fit my 2020 profiles in a different angle (see picture to understand what I mean). With the original design, it was not possible to make such kind of connection.
I am very grateful to subcityzero for uploading the original design. I modified the STL file using the online app Tinkercad.