The ET Manager cartridge was discontinued. It was basically a buy out from another company. It was a HUGE disappointment to me. All it did was adjust the water budget of each program up or down based on the paging signal that it received every night. For it to work properly it really relied on having the correct program put into the controller initially. I had always hoped for an SMT on a cartridge type of deal for the LXM. I think it could have probably been done if they had wanted to do it. An LXMEF with stand alone, on site ET AND flow monitoring would have been a hell of a controller. The only thing that ever came close to that setup was the short lived IM Controller. I had two of them on a site and they were an interesting controller.