Well in my 1C upgrade thread I posted about JB Welding magnets on my drivers. so I thought I would post some pictures as too where I JB Welded my magnets and why.
In the pictures you can see where the first plate has been stamped and used to rivit this plate to the basket. IMO it would take a good jolt to snap this section off so I see no reason to JB weld there.
In this picture you as well as the first pic above you can see where the glue failed to hold the magnet in place.
In this pic you see the back plate, the pin or shaft for the voice coil is what will lock up your driver if you have a magnet shift, you can also see where the glue failed as well. this is the reason why I JB Welded my drivers in the eight places I did.
A final pic to see where I used JB Weld. Now I am not saying you need to use JB Weld, I am sure you could use other good adhesives that are on the market.
Now just because our drivers are 20+ years of age doesn't mean you will have a magnet shift, for me since they are out might as well add a little insurance since some of these drivers can be hard to find..