" am still waiting to see what my options are if one of my damsels is being aggressive. Should I flush him?"
I think you need to take a step back and think about what you are doing....
An aquarium, if done correctly, is supposed to mimic the natural environment. You are making a habitat for LIVING creatures. The damsel that YOU bought is YOUR responsibility. Damsels on the reef are territorial creatures. You can't blame the fish for your mistakes.
Read, read, read... then think, think, think. After that make informed decisions. If you get different opinions, then analyse what the different arguments are.
Above all, remember that your fish are living creatures. They are your responsibility to protect, raise, and provide a healthy shelter to.