It is, IMHO. The two tiny Allen screws that fix the flip mirror fix also the plug thread for the illumination unit.
Moving the mirror forward and backward loosens the plug thread and hence it is impossible to plug in the illumination unit properly.
Too bad. After I received the second non - working unit I gave it up and switched to a Baader Sky Surver V which is less expensive and seems to be a more solid device.
Apropos illumination unit: This thing is the worst design i‘ve seen for years.
It disassembled by regular use around midnight last week. No fun to pick up the pieces.
The only thing I worry with is how to mount the Baader on my scope.
The basic mount works but isn‘t optimal.
Any further hints are appreciated.
Thanks and best regards, Karl