Ok I think I have my head wrapped around this after doing some more research. If I get my PB to add another three way valve and actuator to that T section on my return between spa and pool and an actuator on the suction side between pool and spa I should be able to put it in spa mode (suction and return on spa only), pool mode (suction and return on pool only) and spillover mode (suction pool only, return spa only). From what I've read here on this forum I'll set up a schedule to run pool mode the majority of the time and then spillover mode for maybe 30 mins twice a day (noon and 6pm example to manage pH levels). If I find I need to run the spillover all day then I could add a bypass line on the return side to the spa later. I'm using the Omni hub which should allow me to control all this from my phone (two actuators, vs omni pump, heater, salt). And if the spa jets aren't sufficient I can always add a bubbler or pump later.