today I just added a 6inch 4ga wire from the battery- to the chassis. Just wondering (before it gets dark and if I can tell if I still have dimming problems) if it would've helped or if it's pretty worthless doing just one out of the three.

The stock battery ground wire had to be like 10ga or something. I figure that if I got two amps that put out on an 8ga ground wire, an extra 4ga chassis->battery wire should help a lot? (even though 4ga is not technically equal to two 8ga wires)

Cause if the car was fine with it's stock stuff, and I add a 4ga power wire, how bout an extra 4ga ground wire?

I'm still gonna do all three with 0/1 soon though; just wondering if what I did today was a waste of time.