I mean, yes, it's a thing to do in the future. But that does mean cutting holes in the quilted layers of flak vest, and fixing it all into place. Not something I'll get done overnight before heading to London manana.
Also, I planned on the magnets approach because it would give my flak-vest a cleanlook. I'd basically velcro in place magnets on the inside of the flak, and have fixed ones to the armour. So it would just.. casually snap into correct place without too much hassle. Which it did. For x amount of time before the adhesive pads the magnets came with failed.
I'm going to try a bit of re-sand the inside of the armour, dab some superglue on the adhesive pads, then add some epoxy resin around the outside of the magnet on the armour, just to help hold it all in place. Then I'll see what it's like in the morning.
Edit: Just for the general bit; Here's how it looked as it was (note, just in a basic wearable fashion for SWC, not a finished article), it's the backup belt, that doesn't actually fit my main blaster, and none of the assorted accessories that the finished product will be carrying.
And how you can tell things were starting to go wrong....