My niece sent me a picture of a spice rack and asked if I could print something similar. After a quick search on Thingiverse I found the spice rack by spongybob1958 that was almost exactly the same as the one she wanted.

After some discussion we realised that all of her spices are in taller bottles so the top shelf was useless. I stretched the top shelf to be the same height as the bottom, and using 3X version can accommodate 30+ spice bottles.

After printing my first top rail it was a very tight fit in the base so I made the main body 1mm narrower and the back section 1.5mm narrower. (Only the straight sides were trimmed, not the angled dovetail part). This made sliding the part much easier.

I also couldn't find the right size washers to fit so I printed some.