Needing some storage bins for the garage I came up with the idea for self-aligning stackable bins. Cut from 3/4" ply, the trick is the 45deg on the bottom panel and inside edges. My first attempt was a quick hand drawing and somewhere along the way I ended up with misaligned pieces. So in order to ensure my dimensions made sense I figured I’d FreeCAD it up. It’s pretty simple but still parametric, able to adjust for material thickness and inner dimensions. Plus, I figured if the design did work out (so far it’s looking good!) I could CNC batches of them, that would only need the 45def chamfers routed and final assembly. Would also update to include hand holds.