I would agree with this. If your roots have access to a nutrient filled, oxygenated solution at the right strength, temperature, and PH, then that will enable your plant to produce vigorous growth. In ebb and flow, and aeroponics, and pretty much any system you think of, you are trying to get more oxygen to the root surface, nothing more.
I also pump as much water as I can to the roots. Like with air and having a large enough fan to clear used air from the leaf surface, you want to have a pump capable of removing used nutrient solution from the root surface. I use 2 x 15-60 Grundfos central heating pumps, which AFAIK are rated at 3000 LPH for a total of 6000 LPH although this is spread over 11 x 1m lengths of guttering in a vertical system. I have multiple waterfalls which provide generous amounts of oxygen. To deal with excess roots, I circulate my nutrient solution with a pump in the tank so that the roots flow away from any pump inlets. I have sometimes four feet of root in my main tank (on top of the six feet from the plant to the outlet), which in the past has been a problem.
Stopping your pump and allowing roots to 'dry out' is just enhancing oxygen at the root surface, if your nutrient solution is properly oxygenated you do not need to let your roots 'dry out' and so you can allow vigorous growth with no down periods of lower nutrient supply. If we say `re-oxygenate' or 'a period of higher oxygen saturation' instead of' 'dry out' (because as you have shown they do not dry out) it should make the best solution more apparent.
Root Zone Temperature is very important, in the context of getting as much oxygen to the roots, the lower the temperature, the more oxygen. This of course needs balancing with the fact that the warmer the roots are the more growth you have. Also the warmer the water, the more chance of root rot.
61F, wait that is only 16c or so?
You want that to be at least 19 (66f), ideally between 21-24c (70f-75f), even more ideal is 22c (71.6F), hehe. I would say to get an aquarium heater set to about 21c (70f)
Your tent temps are about perfect, keep doing what you are doing there!
The knowledge I have been told is to not vary tent temps by more than 2 degrees c between day and night if you can, My Guru says 26 in the day, 24 at night with 22 tank temp. The theory is that growth continues at night if you keep temps up leading to a higher yield and greater strength...
Thank you for posting this thread, I am always interested in the differences between methods, and the only true way is to keep as much the same as possible, use clones, and have the only variable be the method.