In true "Horror Fright" fashion, they don't tell you the diameter of these
Magnetic Ring
but it's 30mm - some of their "magnets" barely qualify as one, but these are so strong you
almost need a pry bar thru the ring to get 'em off :thumbsup:
Haven't tried it yet, but plan to super glue some vinyl shelf liner material (or maybe thin rubber) to some of these, as they will completely cover the female AG style QD's. The magnets are plenty strong enough to hold thru 3-4 layers of non-canvas tarp, so any material that's thick/soft enough to act as a thin gasket should be fine.
Benefits, if they work at all -
Even if your qd's leak a bit, any slow pressure buildup will just force the magnet open far enough to relieve the pressure, but it won't come off.
Easy to stow, just find any non-aluminum part and get it close

Cheaper than the crappy plastic ones I've found
Downside - doubt they would work for the male half
On using zip ties - if you park your baby outside, I would recommend using
BLACK ones - most others have
no UV resistance and will crack/disintegrate in one season typically... Steve