Need a little antenna help

My truck is a Volvo, so I have limited antenna mount solutions. I purchased one of the perch mounts that replaces a mirror bolt.

Unfortunately the threads on the perch aren't nearly long enough, and I cant use the backing nut that comes with it. I removed the nut and have wrenched the threaded perch down as snug as I can get it. My heavy Browning antenna ends up getting blown over backwards because the perch wont get tight enough. I have the antenna pointed forward at about 45 degrees, hoping to use the antennas own weight to help keep the perch more snug. Limited success so far!

What would happen if I used a couple of zip ties in an X pattern around the mirror mount and the base of the antenna itself? Any negative effects from the zips touching the antenna?

Im quickly running out of antenna mount ideas on this dang truck!

 

Same hole except passenger side. The son of a gun just wont stay put for me. I really was afraid to tighten the thing down more than what I have.

I may try what Rat is saying. The only part that bugs me about using loctite would be the perch its supposed to aid the ground plane of the antenna on the truck. Not sure if loctite wouldn't screw that up? I wonder if they have a electrically conductive version of loctite.

Just went and looked it up on Loctites site. Green Threadlocker can be used with electrical contacts. Guess that's what I need to try then.
http://www.loctiteproducts.com/products/detail.asp?catid=10&subid=48&plid=695

 

Yeah, I was thinking about that. I really wanted to leave it on the pass side for a couple of reasons. Since all my runs are relatively short I thought the weight of it would be annoying on the drivers door swinging it all the time. Ill bet I slam that drivers door 30-40 times a day some days. I also wanted to keep it aimed low at 45 degrees, the lower the better for me, as many of the grain elevators I enter have a very low clearance, I get sick of that nails on the chalk board sound it makes when dragging. Antennas don't last that long if you bang them often enough.

If the loctite don't work, I may just go back to a shorter antenna. I know that will work, but I really like how well that Browning antenna gets out.

 

Looks like we have sister trucks. Here is my beast of burden.



This pic was taken before I removed the air dam, I was banging every tree and bridge for miles with that antenna mounted inside the mirror. LOL it was bad. Geeze, its even clean in this photo!!!