Hey Viper 48,
First off, I believe we have the largest cat, she weighs 24lbs.
We just purchased a Rockwood 8283 which I believe is the same as a Flagstaff model. So far, very pleased with layout and construction. It's light enough I can pull with my "special 1/2 ton" and yet big enough that your not cramped. Hope things are working well with your flagstaff.