Fitting Maxton Skirts Help...

Evening all,

Who's fitted maxton side skirts to their RS?

I'm trying to get mine on but they're the worst design to fit. Any advice would be most appreciated. Why Maxton haven't pre drilled them so the suitable mount points are obvious like other manufacturers out there...

So far I've 3m taped them and mounted one but because of the shape of the sill they really don't sit flat. Where are the best points to drill and add the self tappers? 

Thanks,

Mike