I have used trailer wire. It's good wire and cheaper than buying wire in spools. I never told anyone for fear of loosing my credibility.
I do feel better now.
Mark has given me the strength to face it. There are no focus groups for using trailer wire.

For most, buying a pre wired fuse box harness is the way to go. Leave the trailer wire thing to the experts.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn