No, I haven't, and neither should you. First of all, unless they are over thirty years old, they have already been potted, and second of all, you can destroy your pickups quite easily. If they really need it, find someone with experience to do it for you. I would probably call Lindy Fralin, as he is currently the best guy doing pickup work out there, and his prices are quite reasonable. Again, don't try doing this yourself. You will almost certainly destroy your pickups.
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"Cowards can never be moral."
M.K. Gandhi