Carpeting panels

Okay, this was my first attempt at carpet lining. The panel is ply, fixed with self tappers with screw covers. The little panel next to it is fixed with orginal fixings. I think I prefer the original fixings, this panel needs to come off again as the next job is the metalwork. I look forward to this with some trepidation as there are loads of compound curves and the windows to cut round. Below is a close up of the different fixings.