The method loses points in the subcategories of Preparation, Undetectability and Safety.
Preparation is not simple (Pr=2), there is equipment present at the death, and if using a COGen preparation with concentrated acids requires care. Using compressed nitrogen/ carbon monoxide mix will greatly simplify Preparation moving from 1/5 to 3/5.
This method may be detectable on inspection of the body (U=1), and can present some risk to others (Sa=1). The action of the Destiny machine in reducing the amount of monoxide used to a minimum significantly reduces the danger to others. Safety moving from 1/5 to 3/5
RP test result 33 (66%), for Destiny RP is 35 (70%)