A while ago I designed a 3d printable camera slider using cheap LM8UU bearings.
(Why use 608ZZ ball bearings if you can get real linear bearings for cents.)
Now I finally found the time to make one.
I also updated the design to include a clamp on the sled. So this can be upgraded to a motorized slider later!
On the photo I haven't inserted all the bolts yet that hold this together.
I wanted to use steel rods but they turned out to have vastly inconsistent diameters.
So I had to use aluminum rods and am currently inserting a second, smaller rod into them to keep them from deflecting in the center.