Here is the easiest formula created in general from my mentor Fabman

For every 25 gallons of 150 degree heated oil you use
3 lbs of Pot ash aka KoH and 5 gallons of methanol and mix then add to heated oil

If you want to recoup your methanol up to 45 percent max you put it under 15 lbs of vacuum both the glycering and bio fuel. Soaps fall out almost instant and glycering is still a liquid and easy form of green waste to dispose of.