I was going to try the biplane mod to slow the plane down but it doesn't look slow enough for me. So I went with the weight reduction route and got the flying weight down to 1 gram.
A few mod notes.
-Don't try this outside, the 1st try went right to the ceiling.
-Use a prop guard, the first 4 tries were a bust.
-Use a balloon with more lift than needed and add ballast.
-The first part of the video uses less ballast and the vapor floats a little too much. The second half uses more weight and I am able to do the worlds slowest ROG and touch and gos. I was also able to fly it around from room to room.