I have super avenger that I have had for some weeks now. The watch had a very bad power reserve and I constantly had to wind it with the main screw/crown.
I recently opened it up and found the rotor completely loose and the small screw was falling out as I opened the back lid. (It is really tiny, like 0,5-1mm long.
I tried to screw it back but it keeps popping out all the time even though it seem tight when I screw it back.
The watch was from Hont and I think it is a 7750 movement but not sure. It is not branded like the blackbird I got from the same seller but other than the rotor the watch works... Should I send it back or can someone estimate a repair price? I dont really trust the non AD repair shops since I have no clue on the difficulty grade. If it only takes a new screw I would guess like 2 euro
but I guess I am gonna get suggestions on 200 euros from them 
I recently opened it up and found the rotor completely loose and the small screw was falling out as I opened the back lid. (It is really tiny, like 0,5-1mm long.
I tried to screw it back but it keeps popping out all the time even though it seem tight when I screw it back.
The watch was from Hont and I think it is a 7750 movement but not sure. It is not branded like the blackbird I got from the same seller but other than the rotor the watch works... Should I send it back or can someone estimate a repair price? I dont really trust the non AD repair shops since I have no clue on the difficulty grade. If it only takes a new screw I would guess like 2 euro