I have a 263045 Pentair valve that I suspect may be the source of a leak. I cannot find any manual or instructions or video on how to get into it. I took off four top screws, but that shows the electronics. There are six sxrews holding the body to the pipe below, but two of those are blocked by the top electronic cover, and there is no way through that part to those screws. Can anyone give me some steps to replace the O-rings in this valve?