The main challenge here is that the wetsuit has a zip running up the back. I wanted to create a disc holder that could be attached to the back of the costume once it’s zipped up, and removed before unzipping.
But first, I needed a mechanism to hold the Tron disc on the disc holder. This tutorial suggests using magnets inside the disc and inside the disc holder. I bought some strong 5mm Neodymium disc magnets from eBay for quite cheap. So, open the disc again, and stick down two or three magnets onto the inside of the back of your Tron disc, directly behind the four ‘notches’ that you can see on the back of the disc. Then tape them down with some duct tape. I orginally used two magnets in each corner but it wasn’t strong enough. Seal up your Tron disc and pop some magnets onto the outside back of the disc just to test they’re attracting.
Next, make the disc holder out of the packaging that came with the disc. Stick some more magnets down in the corresponding areas and tape them up. This piece of packaging actually makes a great place to store the battery pack and inverter which will power the EL lighting in the costume. So trim the edges of the disc holder before sticking some cardboard on the back of that holder, then tape the battery pack and inverter into the hole in the middle. Spraypaint the whole thing matt black.
To attach the disc holder to the suit, turn it over and superglue two velcro strips onto it. Then superglue the reverse velcro strips onto the back of the wetsuit. The disc holder should now sit on the back of the costume, with your Tron disc held safely in place.