looks and sounds great! time to get that beast in the air
Regarding the drain nipple after about 3 or 4 flights (that's the most I have had in the day with the engine) there is not usually massive amounts of oil remaining. What I tend to do is arrive at the field and start the engine. Let it run at about 3000rpm for about 2 minutes to warm it up and get the oil round it. I then stop, open the plug and let the oil drain for a few minutes before replacing the plug. I then refuel and fly. I do not drain the oil at the end of the day I wait until the next flying session. My logic is why drain out all the oil before you store it? is it not better to keep that oil in there and drain it out a week later (when next flown) and replace it with new oil? anyway, my engine is not rusty...that's about the only thing that's not wrong with it!
I am guessing you have a lot of oil because of the rich mixture you are currently running. I would get it to within 1/4 turn of leaned out and get it in the air to complete the running in
