I use the CE shade of Diamond D and have found that using heat-cure powder with self-cure monomer is squirrely, sometimes it cures and other times not so much. Original shade isn't too far off, it's the closest and feathering the edges helps. I've also discovered that mixing a little orig self-cure powder with CE heat-cure powder gets the shade closer and the cure more predictable. To be honest I don't think I've ever had a DD denture broken that didn't involve obvious mallocclusion, dropping and the last one was used by a dog for a chew toy. The vast majority of my repairs start off with "You didn't make this but, ..." since I started using DD.