Thanks a lot everyone! I'm really happy with this suit.
For those wondering about how I hook the shield to my back, it's quite simple. We attached a thin strip of leather to each of the handles on the back and then a tiny metal hook to the top of the back buckle thingy. The strip also gets covered by my arm when I'm holding the shield so you can't notice it at all.
We were going to put a magnet on the middle of the shield and to the back of the buckle but this is the Disguise shield and it's domed alot more than the movie one is so the magnets wouldn't have been able to make contact. I am able to hook the shield onto my back myself so that's a plus.
Here are some pictures to see what I mean. (If you can make them out).
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