Over the holidays, I managed to acquire some more silicon mold making material, so my plans to craft chocolate dice are back on the schedule. Using my prior setup, I mixed and pouring the components, and managed to successfully remove the mold itself.
Once I got started, I did notice that I was overly generous with my spacing – I could easily have packed in the dice forms much closer, and used quite a bit less silicon. This should not really impact the final results, but it is a note for my future efforts and the efficiency. Unfortunately, silicon is not a cheap material, so any gains here are a good thing.