There are several rates, not just that, for all three switches posted there. To each own

And sure, if a computer controled system can be afforded and you like, go for it. I just meant the "analog" system Derale website offers is not diff from what I posted being home made and cheap, and even more, my diagram is way better than what Derale suggests LOL.

I think will make some other adds on the diagram I made, like the override switch. I will post here for future references.