I see a lot of tutorials on magnetizing Rhinos and Predators and Whirlwinds (oh my!) online, and there is one thing that they all seem to have in common- Most of them use too many magnets. I mean, plastic isn't all that heavy. Do you really need two neodymium magnets to hold up a Predator sponson? I say thee nay!
I submit the following-
WHY USE A SECOND MAGNET, WHEN A NAILHEAD WILL SUFFICE?
Nails are cheap. Magnets are less cheap. And believe me, in most cases, you really don't need that second magnet.