I've just ripped off the centre mat and runner boards from the floor of my PX, in order to get rid of rust, including one tiny hole into the central canal. Eeek! So, i've scrubbed, and put POR-15 and primer on. Now I'd like to put something back on that won't harbour rust so mucha, and is easier to clean (I hate the runner boards because it's so difficult to get grime from between them!) - any ideas? As far as I can tell, the mk 1 PX and the disc PX have different screw orientations for the centre mat, so I'm assuming I'm quite limited to what I can use. Any tips? Thank you!