but I would not go to the expense or trouble of increasing the wattage ratings for R1/R2. Mine are "derated" down to 24 watts for R1, and 36 watts for R2. This allowed me to use a pair of non-inductive Mills resistors for R1, and a trio of them for R2. Wayne's 40 watt specification has an adequate safety margin built in already, going larger will not be needed. Sam