I really liked the stackable electronics mini - rack but it wasn't tall enough to fit the mini PCs I needed to put on it. This is a remix that is 25mm taller. 

It is the same length and width so you can stack the originals and this taller one together. 

I also included a “top only” (or bottom only, depending on which direction you stack them) which I printed simply for aesthetic purposes and can be used on the original or this remix. It isn't necessary but I wanted my items to be fully enclosed. It also helped stabilize the legs.