This bracket replaces the somewhat flimsy stock piece for the Solidoodle 2. My factory brackets were both cracked and due to the lack of stability, it was causing poor accuracy/repeatability in the y-axis.
The overkill bracket is an even beefier piece. Both work. I've got one of each installed right now.
You will most likely need to readjust the y-axis belt tension when you install this bracket. You may also want to install a longer M3x0.5 button head cap screw because the bracket is thicker than the stock piece. The stock 8mm long cap screw will work but a 10mm cap screw will ensure full thread engagement in the case. I rounded off the hex on one of the stock cap screws when I removed it (they used Loctite at the factory), so I needed to make a hardware store trip anyway.