No, I'm always trying to minimize any idling. I have 15 hours of idle since new and it hasn't had any since September. I also have the boiler circulator at high speed. This seems necessary to get enough heat transfer rate to keep enough demand on the boiler as the storage tank is approaching the upper set point temperature.
I was wondering about your HX in your tank if it would be enough to keep up with your boiler but obviously it's getting it done. Good to hear.