Linear bearing help

[tom10122]

I have a snow day today so I figured I'd upgrade my y-axis to linear bearings. The thing is, When I printed all my bearings before , My printer was terrible so each bearing had no wiggle room at all. But now that it prints well my bearings seem slightly too big. I know it is calibrated correctly. LM8UU for the original H-1 right? I was using these http://www.thingiverse.com/thing:18219