The best ones are made from MDF but you can make one yourself from grey board and bookcloth.
![](https://blogs.brighton.ac.uk/viscommtech/files/2020/04/pc1-300x214.jpg)
![](https://blogs.brighton.ac.uk/viscommtech/files/2020/04/pc2-1-300x139.jpg)
![](https://blogs.brighton.ac.uk/viscommtech/files/2020/04/pic4-199x300.jpg)
![](https://blogs.brighton.ac.uk/viscommtech/files/2020/04/PIC33-300x277.jpg)
The last thing to do is to cut the slots that the feet will slip in to. These are 2mm wide and are positioned say 2cm in from each end of the cradle. The length of them should be about 15cm to make them fit into the feet that you made. See diagram 2 if you are not sure.