For the 360, I am aware of two different styles:Style 1 is the type with a metal casing. Using a small flathead screwdriver, you can pry apart the bottom of the casing and pull the internals out. The casing can then be resealed using some needlenose pliers and then crimping/bending it back together.Style 2 is pressed and molded plastic and a small rotary cutting device (e.g. Dremel tool) can be used to cut a 1mm strip of the plastic off of the bottom. The internals can then be removed fairly easily.In both cases, it's a good idea to use something like a silicon sealant when putting it back together. Also, in both cases, the needle is pressed onto the mechanism and you can use some VERY gentle prying and pulling to slowly work it loose.