Note to self re the recent oil leak incident:

At 2,500km service (coming up in about 1,000km), when changing gearbox oil wrap about 4 turns of Teflon tape about the drain plug threads. This should help prevent future leaks, per the Mystery Oil Puddle discussion on Soviet Steeds:

If you check the cds you will see the fellow rapping the plugs gently before removal, but nothing about overly tightening them when he re-inserts them. He does use about 4 turns of teflon tape on the drain plugs before re-inserting them, I believe. That may be just the ticket for your stopping any leakage, if it is coming from the actual drain plug area