Remove all the final fixings. Expose the pipes.
Offer up the
tile just under the pipe. Mark the centre points at the edge of the
tile
Offer the
tile up to the side of the pipe. Mark the side of the
tile.
Draw lines into the
tile to find the centre points.
Use the drill plate and a pencil to mark the hole size and location on the
tile.
Drill the holes into the
tile.
The results of drilling will be a perfect hole in the slate
tile. Offer it to the wall and over the pipework.
Most fittings will cap off and hide the hole (shame..) so you may not have to be millimeter perfect. Also if you are slightly off with accuracy then you can use the sides of the drills to grind out to the correct position. But I am sure you are accurate so will not need to....
Slate is softer than granite and porcelain so easier and quicker to drill holes in.
If you have more questions of course just call me..
Richard