Hi dave46, my V. salvator is just a few inches bigger than yours (and a couple of months older), but he gets two large weaner rats a day, some days that would be replaced with fish, chicks, etc.
I think you made a mistake with the basking temp? You say 100f is fine, it`s far too low in my opinion. The surface temp at the basking site needs to be between approx 50 to 60c (120 to 140).
Or maybe you meant the ambient (air temp)?
Close to my basking site the ambient is around 35c (95f), and the surface is over 55c (130f). I`m using the low wattage halogen (flood) bulbs.