Guys, to stop the squeakiness, buy some adhesive felt (can be found in the kids craft section at walmart).
Cut the four corners resulting in 4 very small triangles, about 5mmx5mmx5mm
place them on the for corners, make sure they stay on the back edge (posterior) and does not narrow the height or width. you just want to make the back part (posterior) a little narrow for all 4 corners
it takes a little more effort to snap the 2 pieces together, but when it does - it is very tight and no squeakiness at all