I know how to to them, I'm making some prototypes for something I would like to laser cut, but I need to make LOTS of these little boxes, and scaling makes a mess with the walls, and my OCD wants all fitting to be of precise length XD, normally I make a prototype a day (cus I change my mind a lot about how to sort things), and have to fill like 8/9 of these boxes with lots of joints, so I was thinking of speeding up things a little bit.
I found a couple of plugins that kind of do the same thing as the one you showed, but all seem to need me inputting measurements, which by my math require tons of decimal places that seem to destroy the programs, or measures are so small that the program just didn't know what to do. I'll see if I can get some cash to but the plugin.
Thanks for you help.