Compact servo auto level with optical sensor

This variant of an auto level I came up with, having looked through many other similar variants. It is quite compact in size. Dimensions 43.4 * 20 * 43.5 (h) mm. The fact is that none of the options I saw did not work properly on my printer and did not rest against the walls of the case or cling to the carriages.
In the process, I corrected the design several times and here is the latest version
The body is divided into 2 parts for convenience of printing, which will need to be glued together.