You know they pulled the update at least yesterday I went and I couldn't find it from the rc link or by just searching all over their site but it is there now. I'm planning on using my expansion socket for my lights being that the Pc4 is still only 15watts.Mine is working a lot better after I upgraded it. Also once I reprogrammed my sump light channel everything sort of clicked into place.
I was impressed that they changed the sensitivity of the buttons on the PC4s via the update, it seems like it has a very well thought out hardware design.
They say that it can control 63 modules so if you use the 3 monitors orp, temp and Ph you should have 60 available modules which is about 15 pc4'sHow many PC4's can you daisy chain?