Adjustable Robo 3D R1+ Y axis bearing blocks

EDIT: 04/22/2017
I ordered bearings from E3D and so far they are working great! So just forget the cheap stuff and get these.
http://e3d-online.com/623ZZ?search=M-BEARINGS-623



WARNING: I have used cheap bearings and expensive bearings and both have failed....
I am only finger tightening the bottom part and the bearings are still falling apart. Why cant I get good quality bearings even if I'm paying 26 bucks for 10 of them!!!
When its working it works GREAT! But until I can get beari