Print bed glass stand

It's taking a long wait to cool down after a print.
Hence, I bought 4 piece of glasses (220x200x2.5mm), however I break one of it when I was replace them after a print.

So I made a stand for the rest of the three.

( The length of the slot is about 200mm)

** Edit **
I've found that it's too tight if the glass are not perfect cut to 220x200mm, I was re-upload a revised version and reserve 1mm space for each side. Please download the new model, sorry for inconvenience.