The top and front of the case are held on with magnets. As detailed in a previous log entry, various corner pieces have spaces for small magnets, with additional magnets glued onto the acrylic pieces. I found that magnets on each corner was more than enough to keep the acrylic firmly in place.

The original plan was to have one magnet glued into the corner piece, and another glued onto the acrylic which would then slip into the corner cut-out. This would aid alignment. However, despite trying numerous glues and epoxies, I couldn't find one which would keep the inflexible magnet attached to the flexible acrylic sheet - they kept coming off. I finally fixed this problem by instead putting the acrylic magnet on the opposite side of the sheet (so it no longer sat in the corner hole) and gluing a non-flexible cap over the top. So far no magnets have fallen off - they cannot flex against the acrylic.

In the above you can see the top/right corner of the enclosure with the top and front magnet cap. On the right you can see the front pulled away, the magnet under the cap on the acrylic sheet, and magnet in the corner piece. I actually put an extra magnet into the corner because I'd made a two-magnet deep hole based on my original plan. This makes the front even less likely to fall off ... not really a problem though.