does anyone already use these thread in crystals, have seen them advertised and ordered some for my girls as have few xmas parties coming up ..just wondered how long a set of 2 took to put in, as would love to add to my service list for bridesmaids, proms and perhaps even pre teen parties .. also does anyone know if i can get then cheaper than £6 have just paid - do any of the beauty wholesalers do them, i know silly stuff (manufacturers) are base in nl, but would rather purchase them in the uk if possible x