I created this slider for macro photography. It uses widely available 3D printing hardware for the most part, and it's fully open source!
You can see the design workflow and the slider in action here:
The best part of using a 2020 aluminum extrusion for the base is that the slider's length is completely modular.
I chose a 150mm profile that results in just a bit over 100mm of travel, but you can make it longer (just keep in mind that the longer you go, the more rigidity you lose).
With this slider, you can achieve precise Focus Stacking. Here is a macro shot taken using this exact setup:
Enjoyed the build?
You can support the channel and my R&D here: [Donation]