Super Customizable Lego Technic Beam

My daughter and I enjoy tinkering around with the EV3 Lego robot set quite a bit, but I've always felt like it needed a more structurally solid frame for assembling the various motors and sensors to the command module.
I discovered Steve Medwin's amazing [Customizable Straight Beam for LEGO Technic](https://www.thingiverse.com/thing:630626) and started tinkering with making L-shaped brackets. After a bit of tinkering, I then found Sam Kass' improved model, [Even More Customizable Straight Beam