Just a few more tidbits for those that care...

- TSA-Pre survives removal of your AAdvantage#
- (as is well-known) changing BA seats once your AA# has been removed is costly - probably best to only remove it at the last minute
- my last flight of the TP run was cancelled, which was rather nice since I didn't really want to take it anyway.
- getting AA or BA to post points to the correct account is very, very difficult ... it is as though they always do the opposite of what you want
- COVID rules seen to make cross-airline check-in difficult, so AA checked me in for SFO-JFK only and I made the BA check-in with only 1 minute to spare (despite a 90-minute connection - online checkin wouldn't work)

However, so far, 360 of the 540 expected TPs have posted - so BA Silver when the remainder arrive.