New construction of custom homes has restarted in my area after a long hiatus and I'm suddenly looking at several S7 projects. All mine are open loop with reinjection, but are divided into two subcamps: 1) Those with flowing wells - 6+ psig of static pressure at the well head 2) Those with standing water 10-20 feet below ground level, mostly owing to a huge paper mill whose water usage depresses the aquifer. I want to design for lowest possible pumping power consistent with maintaining high efficiency of the S7s. I've done several dual Series 5 systems fed by a single well pump (submersible near the mill, surface elsewhere) with speed controlled via a Franklin Monodrive. I'd like to move away from that solution, at least for flowing wells, in favor of using the 0-10 VDC output to drive a variable speed Flow center. WaterFurnace has the 7-Bration rebate program going again, and that requires purchase of a flow center or modulating wellwater valve So I'm reaching out to you guys with S7 experience who are focused on keeping pump power to a bare minimum.