Design is by Mia, a School friend of my sons.
I have learned the hard way that it is wise to mark the pilot holes on the pattern so I don't miss any when drilling (with coins, you drill before attaching the pattern, so it is important not to miss any drill holes). I mark the interior of the patterns in pink. Most of my patterns going forward will take this format unless I find a better combination.
I included a preview of the pattern as a standard image so you could see what the pattern was like before downloading the pdf. You should be able to enlarge the pattern without a lot of trouble.
I plan to start doing some of these cutting in wood to make nice pendant and other jewelry. The advantage of wood is that I can size my cuts however I want, without having to worry about the size of the coins.