Just guessing but I think this won't work. Not sure how russian custom regulations play into this (luggage needs to be presented at point of entry - though this is just transit), but I'd think that LED is simply not set up for this.
AFAIK, LED has no 24h advance checkin like DME for example - most likely checkin for your AY flight will open only 2 hours before departure.
No chance for checking bags through. And as mentioned no check-in facilities late night. Opening only some time before departure. Also you first need to clear immigration, then pick up luggage, then customs. So even if you could re-check it would be after customs.
We had to drag our 80 kg downtown...:-(
Only transferdesk facilities if you travel with carry-on only (and I wouldnt really rely on that unmanned desk...)