You can certainly "spread things out" instead of using a tank tee. Just make sure the pressure switch is very close to the pressure tank.
I also do not understand why you are looking at the 1-50 GPM CSV2W when you say you have a 15 GPM, 3/4HP pump?
I also do not understand why you are looking at the 1-50 GPM CSV2W when you say you have a 15 GPM, 3/4HP pump?