Someone correct me please if im off here ,but it seems like Leon’s cover story for the exploding Ravi heart scale is off and I’m surprised Isa didn’t catch it. If while Leon was in the future with his girls and he took time to rig the HGDScales, he wouldn’t have ability to use that plan until 20 years from when he arrived back to save his family. So the finger snap wouldn’t work until about 19 3/4 years from current time. Evil Empire wins😟.According to 20yr old Aurora, time travel is possible but only into the future. The only exception is a person who is in a future they traveled to returning. Maybe it’s possible to go to the future/travel back making a pit stop a short period before target time to do something(i.e. rig the scales)/and then continue back to the desired time. This would require Leon knowing about possible scales existing,their whereabouts,having Arurora’s Spacial Aray,and the ability to activte and use it. I don’t think Aurora set that up or that Leon had the ability.