played with my O/S/R Caliper for months, it was replaced after the first one stuck on and destroyed the disk. Got new sliders and greased up and freed off a few times, but it always went back to sticking on.
Got a new caliper off Eurocarparts, and its been OK for a couple of years, so I reckon its best to get a new/reconditioned one to sort it out longer than a month or so
Good luck.
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