Hi Morgenes, thanks for the compliment

The black and yellow straps around my thigh plates are held on with Velcro, but I could never get them tight or secure enough to survive a day at a con, in fact they got loose just walking around my flat. Actually the lower strap did come loose at the con, but since I had a fixed abdomen plate I was unable to bend over and reattach it

I don’t like or trust Velcro anymore, it tends to fail at awkward moments and it tends to damage spandex.
So to actually secure the thigh plates I bought some narrow webbing and matching push buckles (the sort of thing you get on light rucksacks) off ebay and attached a small length of webbing and a buckle on the inside of my thigh plates so I had something to secure a strap to. After that I cut small holes just wide enough for the webbing in my undersuit just below where the top of the thigh plates would sit, and sewed around them like a button hole to prevent fraying. Then I could run some more webbing with the other end of the buckle attached though the hole and clip the thigh plate to it. I secured the top of the webbing inside my suit to my bra strap, so in the end my thigh plates where actually suspended invisibly from my bra and the visible velcroed straps merely had to hold the plates against my legs.
It’s a rather unusual arrangement but did work and felt secure and comfortable walking around in. The armour in Mass Effect is just designed for looks IMHO and isn’t actually very practical in the real world