Heat Bed Corner Glass Adapter - Wanhao Duplicator i3 Plus

Inspired by http://www.thingiverse.com/thing:1257772

But made it from scratch in OpenScad.

In my case I've got 5 pieces of glass cut by local glass store, they are a bit imperfect, so in some cases it is required to use an adapter to fit it firm.

Also this model includes an M3 Washer and M3 Nut hole.

Attaching STL model which should fit a popular size glass sold on amazon (200 x 213 mm). By printing the model, you will have only two corners covered. For other two corners you have t