Hey, I finally got around to buying some wire and hooking this thing up as 2 speed.
It was surprisingly easy to thread the new wire through the existing wire hose.
It is pushing only 2psi on low, versus 12 psi on fast...is 2 psi OK?
It has turned up some sort of pinhole leak, with the water flowing so slowly, air is building up in the SWG...will try re-lubing the spider gasket tomorrow, as there is no air leaking in while in "Recirculate" mode.