The one I'm using is overkill. I don't need all the circuits, especially the relays, but I like the modular, waterproof design. And, if something comes up, I have a few extra circuits if I need them. The one thing in this project that has been most helpful is the key on 12v feed buss and the ground buss. You can buy the harness here in the store that converts the onboard 12v power receptacle to continuous and gives you a key on feed to power the buss. It's really handy. I'm getting closer to finishing and I'll post more pictures soon. It's coming together pretty nicely.