Sayam's a pro at this, so heed his advice
I was hoping I didn't have to remove the a pillar - but thanks I was prodding around the grilled and there didn't seem to be any give and I thought I'm gonna snap something so I stopped right more work than I thought ... Thanks guys. Oh by the way the rear speakers on my cabrio are components which I wasn't expecting. I'm not gonna bother replacing those as its a bit of a faff.
Haha, I wonder how I managed to get grills out without removing a pillar, and then putting everything back together =D
Yes, I fitted them back only with 2 of 3 clipsIt holds ok but I didn't know the proper removal way at that moment.