The top swivel on my 16 year old streamstay furler seems to be binding, the result being the halyard wrapping around the headstay. A replacement is available for $700 (just the swivel). The top of the unit has a lock wring which would require a 2 pin wrench to remove, under which is visable plastic bearings in an open race. I assume there are other sets of bearings not visable until it is pulled apart. Has anyone tried to rebuild this type of swivel? If so, can it be done on the foil, or does the whole thing have to come apart and the headstay pulled free of the bottom end to get the swivel off. I am trying to decide if it is worth it, or is it just time for a whole new system ($3K). Thanks!