26-11-12, 09:59 PM
Drilling the heads of is an easy option. The screws have countersunk heads and if you have a drill with a 90 degree point you can drill the heads off without damaging the cap. Not to be too heavy handed of course. Once the heads are off the cap can be lifted off and the rest of screw can usually be undone by hand. If not there will still be enough of the screw sticking out to grip with pliers.