Update - Thanks to Robby I have a new motherboard tray on the way, downside is I have to drill out all the rivets to fit it, but better that than an unusable case. If I hadn't dremelled out down to the braces on the top two slots as per his first suggestion (which sadly didnt work after initially filling me with optimism for a quick fix) I would have taken it back to the retailer. Once this is fixed the case is going on ebay. Coolermaster lost a good customer that always recommended their cases to everyone I know in the past. Stackers are not in the same league as the Wavemaster series (PSU issues aside). This is not a minor issue, it is a major one. I purchased this case as it was advertised as a removable tray on all the documentation and the box it came in. Instead I'm saddled with a mobo tray that you cannot fit a standard atx mobo's cards into. The only upside was dealing with Robby who was very helpful.