Finally I got the dl380p g8 mods (almost) perfected. No more ugly wires. And did some testing and I found out if I solder the connector at an angle the fan slots into the server much easier. So it should be more durable also.
For v3.1 I will make a board that will feed the arduino power from fan 6 so it wont spin up when server is off. But for now you can either never shut down the server, hack a power wire yourself or just not use fan 6 if you dont put much load onto the server.