Clip for holding down 120mm diameter borosilicate glass bed on Monoprice Delta Mini printer. (Glass plate from https://www.amazon.com/gp/product/B07BNJLKMF )
The clips wrap around the edges of the existing aluminum bed and do not interfere with the clips used to hold down the aluminum bed.
Note: after using for several prints, the glass bed started to be able to rotate, which ruined a print for me—I fixed this by dabbing a little hot-melt glue on the plate next to the clips, to prevent rotation.
3-layer walls for extra strength
This is version 7
Bottom view of the 7 designs: 1,2,3,4 in left column, 5,6,7 in right column
Top view of the 7 designs. Final version is unlabeled in bottom right.