Man... looks great. I just lost my hybrid as well less than a month ago. Only 4 months old (fish in avatar), but I spent hours with it every day; that fish was amazing. I ended up breaking the tank down and selling the others I had. All I got now is a 55 and a 40. If I were to get a smaller female I'm sure she'd be OK in a 40 for a while...
Do you happen to have pictures of your old flowerhorn? Also, any idea which specific strain of flowerhorn is this? I've seen these at one of my LFS, and noticed one with that blotch on the dorsal that was different from the rest. No idea it was a tell for a female, and it's really making me want to go pick it up. I love the female flowerhorns, they stay much smaller and don't grow that "kok" which doesn't appeal to me but still have that immense personality and aggressiveness.