Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Could this unit be mounted upside down, to use in a wall cabinet as a pull-down shelf?
Document: The installation of this mixer lift was not as difficult as some of the reviews stated. It took about 3 hours, mostly measuring and pre-drilling. It seems to work great. There are 2 things to look out for.1. I mounted a 14x22 inch board to the supports but when I put the shelf down, the back of the shelf bumped into the back of the cabinet. In my case, this cracked the face of a wall outlet mounted on the back wall.
Shelf lift works perfectly! We are using it to hold our Vita Mix blender, and easily pull it out and put it away each day leaving our counter clear. The installation took my very handy husband 45 minutes. He found the instructions clear and easy to follow. As we have wood cabinets with a frame, he inserted a spacer between one lift and the side of the cabinet to ensure it was braced solidly. This makes the side where the lift is mounted one inch thick (on one side).
This shelf is SO WONDERFUL! I have the large 6 quart kitchen aid and I could never leave it on my counter because it was too large and now I just pull my releases and like magic it disappears into my cabinet and I have tons of counter space to work. Every woman needs one in their kitchen. It was very simple to build in. We made an outlet in the back of the cabinet so that the cord stays inside all the time. I should have had it 20 years ago!
One could make the shelf not as long but the width is important. Spring tension allow adjustments for weights between 10 - 60 pounds. There is also room under the mixed when it is lowered into the cabinet for some storage, say aroung 5-6 inches in height. I am planning on a pull out drawer for underneath the mixer. Almost had a recepticle installed inside the cabinet but then relized it would be a nusiance to plug/unplug.In short this worked much better than expected and is solidly built.
Per the other reviews, the shelf was easily installed by our cabinet builder. The unit easy raises and lowers but wobbles severely when my Kitchen Aid mixer is operated on high. It took my full body weight on the unit to ensure that the mixer would not fall off the shelf when in use. My cabinet maker and I have tried numerous installation adjustments without success. We contacted the company for assistance but have not received a call back (now over 48 hours later).
This makes it so nice for my mixer to not have to be on the counter. It is very easy to use. Pull the shelf up with 1 or 2 hands and then push the buttons on the side to release.
I mounted one of the side mechanisms to the workbench board and kept adjusting its location so the shelf would provide internal clearance as well as come out and be just a little above parallel with the countertop when extended. The top surface of my workbench simulated the top of my countertop slab. This took a little trial and error, but it certainly was easier than trying to do this inside the cabinet.
Of course it was almost midnight when they started so being a bit exhausted may have contributed to their difficulties.The mechanism requires a bit of cabinetry space. We mounted the hardware onto a store bought cutting board (you must supply your own shelf-this kit is only the mechanism) and had to trim it to approx. 15" for an 18" door opening. So both sides need about 1.5" of clearance for the hardware. This was installed in a base cabinet without a drawer.
This shelf hides the huge stand mixer that I love, but do not love sitting on my countertop. With the pull of two levers, it lifts very, very easily and smoothly up to countertop height and locks with a audible clank so that you know it is secure. Pull the two levers again and it lowers into your cabinet in a very controlled fashion.It loses a star because the setup was very difficult for my husband and the carpenter working on our kitchen remodel.
heavy duty and well designed - looks great once installed - Directions should be better worked out - I had a better time understanding them by watching a home made you tube video showing how to install them than deciphering the instructions on this one - on the video at least I could understand why to put the marks where you should. In the end, it looks and operates great - very happy with this unit.
Answer: Could, but the arm extensions and bottom braces could get in the way if the self was narrow...but then for a wide shelf, prob 1.5 ft or more, good idea that I had not considered