I have the opportunity to grab a CAB-50 at a really good price point. My question is whether the output with the "box" style heat exchanger will be the same as my current US Stove 5660 with the short tube exchanger? I have been running around 4 pounds per hour during the cold days with the dead dinosaurs helping a bit on the coldest mornings. (Maybe a sixteenth of a tank burnt) The cab can run up to 5.8 lbs per hr if needed so a bit of reserve there. The quad burnpot and three bag hopper are appealing and I can add some fins to the heat exchanger to extract more heat. Seems like a decent stove for the $$$.