I've got a CB swr meter (well, Old40dog has it now, but you know what I mean)...and I have the MFJ Ham SWR meter that will tune 70cm, too.
I'd like to learn a little more about trimming an antenna for better CB performance. I have one that pegs the SWR meter and it's adj. to it's shortest length. (making it longer makes the SWR worse).
I also have that RF interference going on with my fridge, depending on the turnout, I may look for some advice and diagnosis on that.