David's saftey rating:

A device or composition that has been tested by DavidThePyro usually has David's Saftey Rating.
Like this: "DSR: 1.2.5"
David's Saftey Rating is 3 numbers, on a scale of 1 to 5 with 5 being the most dangerous. The first is manufacture, the second is storage, the third is use.

The example above is a device or composition is safe to manufacture, pretty safe to store, and very dangerous to use.
Get it yet? I hope so, because I'm tired of typing this.