I use a Wemacro automated rail and am very happy with it.
I started out using a cheap manual rail from Amazon or eBay. For anything approaching 1:1, it's unrepeatable and excruciating to use. I wouldn't use it with a microscope objective in a million years. I now only use it for fine focus of single images. Any rail good enough for focus stacking at high magnifications is going to approach the price of the Wemacro.


