Connector for profile 5 20x40 90° with foot M6

The connector ensures the connection between 2 profiles 5 20x40 with 90 ° corner.
The connector saves expensive automatic connectors and makes the construction very simpatic.
It is required per one connector:
4 x M5 countersunk screws 16 mm;
1 x threaded foot;
2 x M6 nuts.
I recommend to buy a foot with steel core, but a STL file is also available here.
This design allows very slight horizontal adjustments of the printer.
Profile 5 has 2 holes with Ø4.2mm, which allows to cut M5 thread