This link is from an observatory, I was just using it as anexample of using garage door tracks. i will be using the treaded rods for control, but I will have to do a sketch to envision if it will work.
These rollers run on one side of the track only.
This would require you to use two tracks mounted top to bottom to provide a linear bearing.
That would be 4 tracks per axis.
There might be some track that would allow you to mount a bearing on each side
or you could run two tracks, one on each side of your axis, with the rollers opposed to each other similar to how v bearings are used.
The mounting of the tracks will also require some thought, because this is a channel and rubbish will build up easily and cause problems.