Afraid the link you have attached just takes you to a create a new thread page. Personally when I magnetise stuff I use 2mm diameter magnets. and for larger models I will put 2 or 3 over the area that needs to be magnetised. When putting them in, first of all I drill the hole in one part, apply some plack or white paint around the edge of the hole and then dry firt the parts. This willl leave a circle where the second hole needs to go.
Hope tha helps!
Me: To be honest im amazed there isn't a chaos god of not revising or at least chaos god of procrastination
MidnightSun: There will be, when enough people do it. Y'know when the Eldar were all engaging in their hedonism and Slaanesh ripped open the Eye of Terror with his creation? Slaanesh will have NOTHING on the God of Procrastination, and his vile minions will carve the galaxy asunder in a thousand year reign of blood.... Tomorrow