Looks as tho you have the procedure "down pat". You know that the filter seal is a "dog" to remove ... I just leave the old one in place, and poke the new filter into it.
If that is the original transmission, you are on "borrowed time" anyway ... but, good maintenance will help to get all out of it you're gonna get. I use MOBIL1 in mine ... but don't know if its worth the investment. Good luck with it.
BTW, you may want to pump the tranny empty before dropping the pan ... a bit less mess.