im having no luck with this torx bolt, so i just removed the speaker mount all together and ill just work on it in my workshop, as biju warned, its turning out to be quite the challenge, some metal fab, i have my pattern all done and theoretically i just need to make a few cuts, mount it and reinstall...
vehigaz, should be able to get a how-to together sometime this weekend, you can pm or email me if you have any spec. questions about how to get to the speakers in the rear before that