The original rest is actually fitted by means of a set of posts attached to the back , they go through the carpet and are then melted into a mushroom shape to fix it , pretty easy to just pull off .
The original rest is fairly thick , so you are right , fitting the new pate to it would look naff and you would probably catch your shoe on the edge .
I also stuck mine down , I used Velcro and a couple of cut down screws to hold it to the carpet , I lifted the carpet first , just for a look , and there is a pretty big loom running right across that area , certainly didn’t fancy drilling into the floor either , god knows what’s under there , probably the fuel lines knowing my luck .
Anyway , so far so good , I pushed it as far left as I could before I fixed it , so it has nowhere to slide and it hasn’t budged at all .