i have done it on my rt and afaik they are the same, its pretty easy i bought a storm single wiper kit, take ur time and dont loose ne of the circlips, oh and when u take the plastic tray bit (bottom of windscreen) try not too loose ne of the clip thingys that hold it on, i pulled mine off and every single clip went PING and i spent like a hour trying to find them.
oh and if u want the wiper in the centre, put it all together and test it, then if it is off centre or ne thing take the bolt off where the motor joins the linkange and just fiddle to get the correct parking spot.
hope this helps.