How to turn any block into a chest!

There is a sick way to turn any block into a chest, like this:

O=Random block
P=Piston (Facing down)
-=Lever
==Rail
&=Minecart
N=Nothing
I will be doing this by making vertical layers facing upwards, so the first layer will basically be viewed from a viewpoint, the first layer will be the back viewpoint. The second the layer after that and so on.

Layer 1:
NNN
NON
NON
NON
NON
NNN

Layer 2:
OOO
OPO
OOO
O&O
O=O
OOO

Layer 3:
OOO
OO -
OOO
OOO
OOO
OOO

Instructions:
Now that you have 2 layers (Including the button) made of a piston, a minecart on a rail and blocks surrounding it. Make sure too use whatever block you want, preferably bookshelves or just stone.

Now, switch the lever so that the piston pushes down the minecart, if done right, you should find that the block pushed down by the piston has turned into a chest when you right-click, with the title being 'Minecart'.

(If the minecart is sticking out, then simply rebuild the contraption but the other way round)

Now, simply break the piston and the lever, and refill the spaces with whatever block fits best. Now, it should be that every time you right-click on the chest-block and a GUI should open with a chest, now fill the chest with whatever you want.

The chest-block is now ready to use!​

 

Thanks Elkus <3
Btw thx for the follow