Double Female Lego Plate (non-customizable)

2x2 work in progress double female lego plate. I saw that the Lego customizer's double female did not include the piece that I really liked using so I made this prototype. The fitting is alright but I'm working on improving it before finally building one is SCAD so you can customize the dimensions of it to suit your needs.

There's a customizable version available now where you can change the number of studs in the X and Y directions: http://www.thingiverse.com/thing:1610388