First time post here from a first time user so please bear with me.
I'm trying to design an insert for one of my toolboxes to tidy the thing up. Basically, it would be a 400 mm wide by 300 mm high cube. I want to have it laser cut out of 4mm ply. My question is this: how do I create the finger joints on the edge of each side of the cube? I have seen designs on the tinkercad forum where people have used fingerjoints but I cannnot for the life of me work out how they have done it. Any suggestions gratefully received.