Tetracube stacking block puzzle

Stick with the (5) classic "2-D" tetromino shapes, or elevate your game with the (3) truly 3-D tetracubes. The blocks fit nicely onto the Base plate; they can even overhang without issue. Print all 8 tetracubes and try to stack them into a neat 4x4x2 (two-high) box on the Base plate. I swear it can be done. No cheating!

5/27/2025 Update -- I corrected a slight cosmetic mistake with the 3D-S and 3D-R files. Some of the chamfered (beveled) corners had "setback" resulting in a flat, triangular intersection. I prefer the look of a corner point intersection, as if milled on the 3 edges.