Stacking Yukkas Guide:
Okay first of all you will need 2 z shelfs and 2 yukkas or something like those that you want to stack.


Next you will need to put both shelfs on top of each other by the walls of your room, then put a yukka on them.

Now get rid of the bottom z shelf and add the second yukka on top of the shelfs where the first yukka is. Get rid of the shelfs and tadaa, you have done it!


Please submit your own Tutorials and Guides here, I will also submit some more.