Thankyou for your feed back...on both there. I have done Amp installs before and did the 2 gauge to the 4 gauge after a spliter and never had an issue but for the first time I was doubting myself after a couple people said they heard that would cause issues. I don't see why it would but I thought maybe I was missing something.
I have always used atleast the same gauge ground as the power. maybe to make it easier I will take a good ground point(usually i used a bolt down spot for a seat) run a spliter off that and distribute to everything that way there is a 2 gauge being split to 4 gauges. This would make it the same as the powe then. What do you all think?