Aluminatus TrinityOne plate corners

I prefer these corners because they're more adjustable, and easier to adjust—you don't have to remove the glass. In addition, the heat spreader on my printer is slightly larger than the glass. The stock corners would secure the spreader, but there was still some play with the glass. Not good. These corners have a slight overhang that allows for a larger spreader, but still secures the glass. Also note that once in place, you don't have to hold the nut while you loosen or tighten the upper scre