This looks like a great and simple solution. I was able to locate and download the instructions. Read through it all and I am really interested in these for multiple projects. I definitely like how the wiring is simplified with running A/C. I think you have a real winner here.
Here's the link to the instructions if anyone would like to read up on these more.
I'm planning on running this. The twin fans on the Ron Davis radiator work great and easily cool my buddies LSA Chevelle, but are loud at full power turn on. I'm thinking this fixes that issue.