Great list, 100% agree. Hopefully your PB can just do 1 and 2 all at once. I love ScreenLogic, can't imagine not having it. Also love my SWCG. Also love my Robot.
I would get the IC60, it's just nominally more than the IC40.
I have a Quad DE 100 and don't have a backwash valve. Never felt like I needed one. I just break it down and clean the filter 1-2x a year.
Matt, JoyfulNoise, has a great tutorial on cleaning the Quad DE. It's super helpful and easy to follow.
Guts of QuadDE Filter
The tank is flush with the base except where the pump is located. That width is very close to 17”.
Also, to the other question, yes, you need an Intellichlor to operate the IntellipH.
I have a negative edge on my pool and spa as well as laminars that cause tons of aeration, so my pH would always rise. I added borates but that helped very minimally. Some pools just have a hunger for acid. I was adding acid everyday and as you know, that gets old really fast with the toxic...
I use an Airhead pump, love it. Super fast and powerful, only negative is the loudness of the motor. Make sure you get the 120 volt to plug into any outlet. There are many "Airhead" pumps on Amazon, I recommend the more powerful one like this...
Hmm, my tubing seems to degrade quickly. I change it when the pump heads start making a crazy loud squeaking noise. Noise goes away when I change the tubing and clean the head. The tubing looks pretty bad by that time and definitely in need of a change. Wonder if I have a microscopic leak...
The IntellipH is still going strong. Love it! What I don't love is the price of the pump head tubing. I run at undiluted full strength acid, but I'm having to change the tubing about 3-4x/year. Up to this point, I have just bought the Pentair OEM tubing from an online vendor at ~$38 per...
I usually take mine out after it's cleaning cycle because:
A. The manufacturer recommends taking it out and cleaning the basket after every cycle.
B. I think it butt ugly to leave the robot and it's cable in the pool.
I think it's personal preference.