Yes, he is an Ohrndorf V12,The drawings contain instructions, but English is not my native language, I can't understand the instructions inside. thank you very much for your reply, I will try it.
I am not a professional mechanical processing worker. Parts are not made by me
I have processed most of the parts and tried to assemble and have problems.
The parts of the red arrow are active. Is this normal?
How to install the green arrow? How to assemble angle accurately?