Pool fx

Yes you are on the right track. Everything you mentioned will work just as you planned. With that variable flow pump you want to set the spa flow "while heating" a lot slower than full blast. The slower you can get the water to go through heater while still making enough pressure to engage pressure swith the fast the spa heats up. Then once the spa is hot and you are ready to get in you will have another button programmed such as air blower. When you push air blower the variable speed can hit full blast also to ensure great jet action!