Teres Ilium repair advice: magnets

I have a couple of Teres cocobolo turntables (265 in an Adirondacks cabin and 3XX in Oakland CA) and love them.

The 3XX has a Teres Illium tonearm and I love it, too, even though the stabilizing magnets have fallen out. (Schroeder Reference in the woods, if anyone cares; a ZYX UNIverse Premium travels with me; I am a lucky man.)

Since the magnets stick anywhere on the plate underneath, I presume there's not a magnet there but something like an eddy current that does the lateral stabilization. (The half-educated are the most dangerous...  ; ) 

Questions: 

1) Is the above true, or is there a better layperson approximation of the real physics?

2) Should I reinstall them with both Ns pointing down, or both Ss? How can I differentiate? Does it matter? Or maybe they don't even have to match? (They're pretty far apart.) (I guess that's 2a,b,c&d...)

3) Stick 'em in place with Loctite? Or?

And, unrelated but if you've gotten this far you may know Teres (& the site is sadly now showing Sumo wrestlers.)

4) If I want a square-cross-section O-ring on my Verus motors is there anywhere I can find them?

Thanks!

Brad