under sink shelfs movable and resizables

The furniture under the sink is quite toll but it doesn't have any shelf.
I saw something on amazon that could be used in nearly all furniture, something like this:

link example link.

I said that I could do something similar so I designed 2 bar holders and movable minishelfs.
The bar holders are connected so it is easier to keep the bar's distance, you have just to level them. Clearly easy to print if you have a larger printer like the cr-10.

The pictures show much better the idea.
I am printing right now other minishelfs (they take 18 hours each on cr-10).

NOTE: you can find the fusion360 files so that you can modify them at your will. the mini shelf is parametric, look at the parameters and play with them.

I hope you can find useful as I do.

If you improve the idea, please let me know.