Ball Valves on a Tee vs 3way valve

Here is what I am trying to do. I was thinking while I am at it, I could isolate both the heater and SWG. I only ordered 1 three way and 1 check valve for the heater. Now I am thinking the best way to do this would be a 3-way on each side of the SWG.

Circupool RJ45. My signature is off because my pump station is disassembled and I'm rebuilding. I track my balance carefully but my heater prematurely wore out. I'm on the north coast, it gets used a lot. Blows my mind the front of the unit says to install a check valve but installers don't do it. Now that I am rebuilding, I don't want to touch it again. My pool is closed all winter and it takes a minute in the spring to re-balance and clean it up. When my heater was leaking I had to shut the whole system while I evaluated the problem. In the end I took it out of the loop. I would have preferred to troubleshoot my system without shutting down the pumps. While I am at it, wouldn't it make sense to be able to take the swg off line while still running the pool? I would do it for spring cleaning, repairs, whatever. 2 way valves are cheaper Than 3 way, though maybe it doesn't matter since this is a permanent change.