Well, the actual CPU cores are designed by Imagination Technologies, which are based in UK. I would not be so sure that they are fully safe. You can make an ar

Well, the actual CPU cores are designed by Imagination Technologies, which are based in UK. I would not be so sure that they are fully safe. You can make an argument that it is still an improvement, because there are no obvious binary blobs required by the system. But in this case, I would recommend going for one of the many Chinese ARM cores -- at least you can buy them easily.