What can you do to reduce the chances of microphonics and feedback when using covered humbuckers?
The best way to reduce microphonics in a pickup is to make sure the components inside the pickup are firmly secure and I believe using a warm soft wax potting to help reduce unwanted feedback from the pickup. I don t believe in potting or encapulating (epoxy) vintage pickups. Epoxy potting is permanent and future repair or modification can be extremely difficult if not possible with this kind of potting. Extreme care and safety should be taken when wax potting pickups. The vapor from the wax is extremely flamable and proper procedures should be followed.
