Hey, new to mp3car but not new to installs ive been working as a tech for quite a while. I installed a computer recently for the subaru north america demo car for the CEMA conv last year in los(wages)Vegas, this along with a touch screen moni made for the computer that took the place for the old pocket on the dash, this system ran along side a X-box and kenwood kvt-911dvd in dash unit with a 15" drop down in the rear.
point of this thread (sorry for tyhe history lesson)
Octanium
http://www.octanium.com/ power supply opt/shutdown controller
smaller is better when installing this thing is built for a car and its noise power

this is the soft shutdown controller
http://www.soltronixstore.com/Detail.bok?no=7 this stuff so far has been idiot proof being that the subaru travels all over for demos with out problems
anyways ive been reading these other threads and it seems that i read more questions then answers about opus so i figured i would throw this out for people to see