Yea, I was thinking of doing this exact same thing to my car that you have now, its definitely got a clean look to it, great job.

 

I think the bigger ground wires is a good idea, however i think you could have done a better job of running them through the engine bay. It looks kinda messy with red wires everywhere.

 

Bigger ground wires won't do anything cause the whole car is just 4 gauge ground wire so going bigger will do nothing in this case...adding more may do better but changing the size will not help...

Just ground it in different places if you want to do it that way.

 

Don't see how that would do anything but it's your money, I just wish I could have come out with it first and sold a million of them to people who know nothing about cars...