I am looking for linear guides and ballscrews. Three sets, with 4-5" of travel only, so they should be 7-8" each, right?

I prefer that the linear guides are as low profile as possible, and the ballscrews will be working with a nema 23 size stepper motor if that matters.

Also, is it unheard of to have linear guides running with only one slide? Or do you absolutely have to use two slides? I would like to use one slide since the machine will be so small, and this way my linear guides could be much shorter, and get me much more travel.

At this point I have every part needed except my linear guides and ballscrews, and my design is complete. I just need to get these parts so I can verify the size of the body before I send out my orders for custom metal parts.