@Yashka I am glad you seem to have found the build relatively straightforward. Your images look very good. Did you take note of the Openflexure Microscope V7.0.0-beta1 released thread bugs and bug fixes? The lens spacer for the low cost optics of the beta-1 release has a mistake in the lens holder which can mean that the lens sits at an angle. From the quality of your images, the lens must be straight even if you did use the lens spacer that has the bug!
I shall make a note of your comments in our issues list. Improving clarity of the orientation of the Pi camera on the platform is not something that we had spotted before. There are currently not even words in the instructions to describe the orientation. The latest iteration of the camera platform has a small dimple on the top of the platform which is the optical axis and sits under the camera module (merge request !309 with changes visible in the view app button from that page, at least until it is merged into the main version). That should help with making some description of the orientation in the text.
The power and camera cable issues are known, but have not actually been listed yet!
It would be really interesting to hear how you get on with applying this for histopath education.