Now these magnets are pretty cheap nowadays (you cn get 100 on ebay for less than 5 GBP /~$7 including delivery), so I wasn't that bothered about using double the magnets, I was more concerned with how long it was going to take me gluing all these magnets to flight stands well. Of course, you don't need two magnets if one side is a ferrous material, which got me looking into 3mm diameter steel rod. You can pick 33cm/13" lengths of this up on-line or on ebay for about 7 ($11) GBP per metre delivered - I got 10 lengths for 20 GBP delivered.
Each of these cuts into 7 FSA flight-stand-length pieces, but of course as it's stock material you can cut it shorter or longer if you want some variety - this also has the advantage of making it easier to cluster your ships together without cross-talk (sneaky, eh?). Cutting the lengths is the dullest part of the operation, but obviously was made harder in my case because I was making them for a lot of ships at one time. Once cut, they need levelling out and de-burring which only takes a few seconds per piece.
On the resin models, the magnets aren't necessarily doing the holding up of the model, they're more keeping it in place, so the rod still needs to support the model lateraly. As some of the resin peg holes are shallow anyway (the Sulan and Aquan cruisers, together with the Dindrenzi Heavy Cruisers are worst for this), they really need drilling out some more. Here's the magnet in a drilled out Relthoza battleship - just visible down the dark hole...
This is easier on some models than others - Terran cruisers aren't very deep to start with! I mentioned some of the holes were pretty wide anyway, and again the Sulan cruiser comes up here - it's got such a wide, shallow hole I don't believe it would stnd on a normal flight stand anyway. When I first magnetised one the magnet sat flush with the model's hull, and the weight of the metal front just pulled it down. After digging the magnet out of the epoxy, drilling a deeper hole and re-magnetising, they do very well indeed. Here is the Rethoza battleship above being held upside down on one of the steel-pegged flight stands - just the magnet holding it there... (I did test it out a few inches above a soft cloth before doing this, but was still a bit nervous!)
So, for an outlay of about 25 GBP ($40) you can convert about 70 flight stands (which should be enough for most games) and have a bunch of magnets left over for other projects - plus you can use the left-over Spartan plastic rods to glue lava rocks onto for asteroids!