I'm tiling a 'u'shaped shower enclosure with 10mm thick slate tiles. I'm fitting a frameless merlyn series 10 shower door (http://www.merlyn-bathrooms.com/merlyn_local/products/enclosures/merlyn/10series/product.php?product_id=97) which has two metal profiles to hold the glass in place vertically. From the pictures it looks like these will not angle over the edge of the tiles. I assume the edges of the tiles will be showing, or should I use a special tile trim?