Re: 2007 antenna issue
Just did this on my 05 WK. The metal part with the groves was a nut on mine that I had to add a little WD40 to and then use expandable plyers and unscrew it, like any nut. I used a thin rag between the jaws of the plyers and the surface of the nut and covered the surrounding area with a clean rag so as to not get any of the WD40 on the paint. This is only how I did it and I am not sure if the 07 model has a different attachment method but I doubt it. Good luck!
2005 Deep Beryl Green WK 5.7L Hemi: QD II/ SRT8 shifter, petals, roof rails, wheels, grille, rear Brembo calipers, rear sway bar and springs/ body color mirror covers/ Xtreme HID 4300 Dims and Fogs/ Cabin Filteration Kit/ shorty antenna/ SC Flashpaq 91 tune/ full LED interior and partial exterior/ BWoody 4" CAI/Stillen headlight covers/ partial de-badging/ My GIG w Lockpick/ 22Elite leather console cover. Mods to come in the Spring: WK bilsteins, SRT springs, Bwoody end links and Brembo calipers for the front.