I bought these nifty rectangular (5 x 1.5 x 1mm) magnets from first4magnets.com for the war walker.
|Eldar Missile Launcher before magnetizing|
|Using a scalpel, the protruding part that fits in the socket is removed|
|Make the new surface flat using a file|
|Attaching the magnet with super glue (I used the end of a drill to apply the magnet)|
|Leave i to dry|
Make sure you get the polarity correct on all magnets you attach. If not, you might (as I did) need to remove some magnet to flip it.