Mike, I just took down my tank and am not using my Apex. When you say "brain unit" do you mean the square controller...used to program it? I was actually having trouble with mine before I took it down so I'm not sure what state it's in. I'd be happy to send it to you if you want to try it. I also bought a Fire that I was going to switch to as the controller but I never set it up. Let me know if either would help.