Gridfinity Base Plates for Ikea Vesken cart bins

These Gridfinity base plates are designed to fit the rounded bottom of an Ikea Vesken cart bin.

Print the center plate once, and the end plate twice, and you'll have three base plates that will press-fit into the cart bin snugly for a 3x11 base.  I was able to print these plates without supports, despite the rounded bottom edge.