Simon, you will be making a BIG mistake if you drill the holes using a hand held drill. At the rear, one of the screw holes is close to an induction hardened area and if you are drilling this by hand, the drill tip will wander off course. At the front, all of the screws have to be exact otherwise the tapered screw heads will not seat correctly in the tapered rtecesses in the pads unless the screw centres are exact. Tey can bind, tip and snap. It is up to you of course but it WILL go wrong if you don't take our advice

My advice is to find a friend who has a pillar drill