Ok, I've reduced the guage mainly cause it was too thick,
I'm running 12 guage with a weather proof 3amp fuse.

I've also got hold of some strapping, to secure the back of the DIN unit, since most stereo cages are only held in by the tabs you push out. I'll have to drill a couple holes into the mounting cage to secure the back.

Cheers,
Jaidev