You can double the amount of sodium ascorbate in Mytol without significant increase in initial activity. That will decrease the amount of developer required to do one roll, or allow you to do 2 or more rolls in the same amount of developer that would only do one before. It will also increase the storage life. The extra ascorbate acts both as preservative and as replenisher. The sulfite may salve your conscience and change gradations, but will not preserve ascorbate as it does hydroquinone.