Hey Stew!
You are doing pretty good dropping 2 lb (or 1 kg, right?) per week. They tell me that 1 lb per week is the most a person should lose, but I haven't found any reason why. I understand that dehydration could be a concern, but I am doing so much water per day, so that is not a factor.
I haven't accurately measured my body fat percentage, but some of the online calculators at 30%. That means I have at least 75 lbs of fat to lose still. (Ewww, that is an awful mental picture)