I'm about 60% of the way through making Chapter 4 and expect to finish in early May. Chapter 4 looks like it will be about as long as Chapter 3; I won't know for certain until I get the final 2 scenes written (the final scene especially is going to be a ton of work).
Scene Progress:
Scene 1: 20%
Scene 2: 100%
Scene 3: 100%
Scene 4: 85%
Scene 5: 100%
Scene 6: 100%
Scene 7: 90%
Scene 8: 0%
Scene 9: 0%