Well, I wasn't exactly sure where I was going to run the IC off of yet. This was more of just an interior auxiliary use idea. Right now I've got the power drop running my homelink(which I know uses next to no power) and my PLX wideband. PLX doesn't suggest running multiple sensors off of this circuit. What I thought was that if I wire this little bus in then I could have some individually powered circuits. Not really worried about using a lot of power, just looking for clean power with a clean install that would have easy access to add more stuff if for example I wanted to add some LED lighting circuits or whatever. One circuit will probably be used to install some plug outlets though.