Freightliner cascadia stock cb set up.

find a cb shop shop that can do exactly that called a factory install... talk to them and work out exactly what you want done......

 

I think you answered your own question ??? and figured it out yourself. judging by watching some of your video.

 

Looks like a good job to me! Thanks for the video!

 

not many people have to ground their radio. I do because I run a 350watt radio that drives a straight 8 linear !!!

 

The truck itself is your whole problem.
It's a bad design not conducive to a counterpoise. I'm sure if I took your stock antenna from your truck and put it on my truck it would work just fine so it's not the antenna.
How you attach the antenna to the truck determine how it works. Where you mount the antenna on the truck also determines how it works.

 

Our shop has been putting a completely separate mount on either the driver's door mirror or a grab rail on the sleeper's rear. On a few, we've been using an "Outbacker" mount to get the mount point closer to the left side of the vehicle. In either case, we've been having great luck by putting together a vertical dipole. There are a couple of handy rubber-ish hole plugs at the bottom-rear of the sleeper, and we typically use an FME fitting on the end of the coax so it can fit through a 1/2" hole (with a grommet). We're using US-made RG-8X for everything up through UHF (if under about 30 feet), but RG-58 is fine for most folks, too.
Most of our customers really don't want to pay us for the time to route coax to the existing side mounts and make the run inside the truck. An advantage of the FME connector set is that a driver can use some down time if he wants to re-route the coax without any fancy tools.

We've also had good luck with a front mount at the edge of the Fibreglas® roof and self-stick copper foil radiating from it on the top, but aesthetically it takes bit more time to get the tape to look like the surrounding gel coat, or to somehow look nice. It starts out shiny, but quickly weathers unless it's protected with some sort of coating.

The vertical dipole is much faster, give a more symmetrical pattern, and looks more "normal" than the spiderweb copper counterpoise.

HTH
73