SEAS 25F-EW repair and hack

The classic 10" driver from Seas, sold truckloads in the 70's. Still reasonably easy to get hold of, at least here in Scandinavia. A lot of them suffer from loose magnets due to moist storage, the zinc plating on the steel parts of the motor expands and cracks the old (sloppily applied) epoxy. Well, what better fun on a rainy sunday, let's have a look at what's inside and possibly a way out of the misery;-)