Doing a refit on a friends kitchen and i have come across a small problem with the kitchen taps. They are good quality peglar ones, but the small soft washer they come with is very poor. I am unable to secure the taps enough ( stop them turning or wobbling) with this flimsy washer. Would some top hat washer be better?, allowing me to ensure that the taps are firmly attached to the sink. Any advice/help greatly appreciated.