Mini Time Machine (2x2x3 extensions)

Make sure that the base cube is a Z-cube 2x2x3

Need a little bit of sanding in the lateral faces, try assembling 8 pieces first and judge before completing the assembly

The last piece might be hard to assemble, in order to avoid this issue keep the last pair of pieces disassembled, then introduce the little piece (Quesito B) in its place and finally fit the other part.

You can use a small drop of super glue to make sure that the pieces will not fall apart.

https://www.youtube.com/watch?v=gPAYzFJUmDc&t=119s