I mistakenly purchased a Sun Shelf 3 Mini when I should have gone for the normal sized version. However, I was told that if I bought a 2nd Sun Shelf 3 Mini, it would be possible to stack them on top of each other therefore creating a normal sized Sun Shelf 3. Unfortunately, in order to attach both Minis together, you require a nut and bolt for both sides. Now according to the instruction manual for the normal sized version it states that it comes with a set of nuts and bolts to attach both shelves together. After communicating with Gathera, I was advised to find a wood screw in order to attach the shelves together. It would have been amazing if Gathera could have provided a set of nuts and bolts (which I would be happy to pay for) to attach both shelves. I have had to use four zip ties to attach both shelves as a stop gap but obviously would prefer something more permanent.