Corner for enclosure

I'm building an enclosure for the Ender 3, and needed a way to connect wood panels. A quick search led to nothing that looked sturdy, so I made my own in Tinkercad... it's meant for 6mm thick panels and a quick test with my 80x80 cm squares make it look fairly strong. Takes about 2 hours and 15 minutes to print for me, and that sucks given than I still need at least 5 more (thinking of making a different version for the frontal panel) lol

*Update*: do **NOT** use them for the top corners! A t