I welded a bolt to the cage which is grounded to the body and sub frame The aluminum front motor mount to the motor (I thought would be enough (not) lessons learned
In all cases no one has said that the start of they're ground point was one continuous welded part. IF your ground path through the chassis is not one welded loop I would agree there could be a problem. There is no way that there is resistance in a properly welded cage/subframe assembly. If there is you have a much larger problem. If you would like to add the cost and weight of an additional ground, by all means go ahead. I troubleshoot prototype vehicle wiring for a living. I believe in my methods. They are problem free for me. Just my 2 cents.
Doug
