Zero profiled IPD adjuster of the EMS

There are cases that your OTA does not have enough back-focus for the IPD-Helicoid, or you wish your Binoscope as compact as possible.
In those cases, you had to choose the sliding mount instead of the IPD Helicoid. But, if you insist on the solid (fixed) structure of the Binoscope with the minimum OTA span (“D”), you will wish zero-profiled IPD adjuster.
Today, the experiment is successful.