Great write-up!
Thank you for your kind words.
Some comments:
1) Did you at least try to remove the "old" o-ring? I wonder if you could have removed it with a needle nose pliers. On my e46, I removed the o-ring by using a screwdriver and pressing UP on one side of the ring. The ring then went into a 90 degree position where I removed it with my fingers.
2) When you topped off the oil while the car was running, was the transmission warm? I am surprised that you didn't need to check for temperature. When I did my trans fluid change (ZF Trans.), I didn't check the temp, but the oil was very warm (slightly hot) when I topped it off.
3) Personally, I know you didn't need to, but I would have used the sealant. I recommend you check for leaks in about a month, just to be on the safe side. (This is where a dipstick would be useful, damn BMW engineering.)
4) I can't wait for the Blackstone results. I wish I did that with mine.
5) Lift (Stall Hydraulic Lift- $5.50)
Lucky son of a B&^%$.
Again, great job!!!! We need more people like you on this forum!!!!