Filters are changed and after a couple weeks of circulating just up at the Pump Stations, the valving has been returned to allow flow through the LVEA piping.  The Actuators are still isolated from the flow and I'll keep the system like this for at least a week or so to further bleed the piping and clean the fluid.  Can't really do any testing until the HEPIs are unlocked so there is no rush to open up to the actuators.