I was going through a recent estate-sale buyout, and found an exposed roll of tmax400 marked "'pushed to 1600, '91". I wanted to develop it just to see what is on it, but all I have is D76. The massive dev chart says to give it 18.5 minutes at 20.5C in 1+1. I remember reading that D76 isn't the best developer for tmax, plus I was wondering if there was a further speed decrease or other phenomenon to look out for in exposed film that is so old. What do you think?