Before Tyler's surgery, he would prop sit completely by himself anywhere from 30 seconds to 2 minutes at one time. Now 6 weeks post-surgery, he is sitting anywhere from 4 minutes to a record-breaking of 8 minutes. Yes I said 8 minutes. And this hasn't been a freak coincidence either because he has come close to 8 minutes several different times.
I really think that since his hips are now in the sockets, everything is lined up better and helps his balance. So this makes it easier for him to sit up.
Here is a video of him sitting. I edited the video because he not too entertaining to watch while sitting. He has to use his hands to help steady himself and he is hesitant to actively play with his toys while in this position. So that's why you just got 3 minutes of video instead of the full 6 minutes, which is the total time he sat this time. That is our next goal - to actively play while sitting.