Wow, you got very lucky... I hope your luck doesn't run out at the expense of your Blue Dempsey... Good Luck!
Dominator... Using one lucky experience to base a plan around isn't the best idea... You've had a good bit of experienced advice here in this thread. Best of luck with whatever you do...
PS - There isn't much aggression difference between a Red Devil and a FlowerHorn... and when you create a breeding pair they get a lot more aggressive...
Also, FYI... It takes a lot more than just breeding a RD & Tex together to make a Red Texas...
Do your homework, it'll save you both time and money