Lookup for pbusardo video on youtube regarding the rebuilding of vivi heads. He is rebuilding the head for the vivi nova which is basically the same as the stardust. I have both and interchange them often when i rewick the heads with cotton threads bought from daiso lol.I have yet to try using cotton braided candle wicks as soon as i find a local shop which supplies it.
Oh and don't forget that with rebuilding, you must have a multimeter to test for any shorts first before using it on your PV.
Good advice! *VERY* important you not have a short! The batteries can explode.