Just wanna thanks to Dave.

I've contacted him a week ago for the second time. I had an old ppcoin wallet which password I couldn't remember. I had idea what the password would be and I sent him the required info. A few days later I got reply with the password. I paid him 20% of the wallet, fair price.
The first time I contacted him was in 2014. The situation was very similar - I had litecoin wallet which password I couldn't remember. I sent him the required info and soon after I got the password.
I hope that I don't have to use his services for third time. , but if it's needed, I would contact him again without doubts.

Regards.

I guess that you use the russian miner. Remove all settings except:
  "xintensity": "2048",
  "gpu-engine": "1100",
  "gpu-fan": "50-85",
  "gpu-memclock": "150",
  "worksize": "64",
  "temp-cutoff": "90",
  "temp-overheat": "82",
  "temp-target": "72",
  "auto-fan": true,
  "gpu-reorder": true.
You should have better result.

Still missing ~269 darkcoins.

Pidobir told me that monday he knows if the international shipment is possible or not. I can offer hosting but I'm from Bulgaria, the electricity cost in my region is ~0.083€/kWh and there will be additional customs and shipment charges. Of course hosting in Russia is the best solution. If there is no option for international delivery and locally hosting I also will ask refund. I hope that @baloo_kiev find someone in Russia who can takes the devices.

Май, не е точно така...