I understand there is never a "I trust this device with my life.." but at what point in your learning did you say, This is a tool I can finally use on my tank/s. how much testing and trouble shooting did you do? Did you use a "Test Tank" if so I would be interested on seeing pictures and seeing how you did it. I would also be interested if you have old or even new/current notes on "Testing Procedures" Currently still learning the system and have not gotten into the "testing" phase. I'm still waiting for my ATO senor to be shipped and I also had to by a traveling router... but I did get a LED to blink so I got that going for me, which is nice