Why not just go 15426378 and try it again ?. You will get good clues. Do #1 at TDC, then turn the crank clockwise, facing it, 1/4 of a turn, do 5, turn 1/4 again, do 4, 1/4 turn, do 2. Same deal for 6378.
You can do the entire test with only 2 revolutions of the engine. Sorry that we assumed that you knew this. I was trying not to over explain cause you guys are all trick around here.
You don't need to wait 5 minutes, just keep closing the valve and checking or adjusting it to zero before you test.
And do the slight rubber mallet tapping trick, and listen as descibed, and look.
All of these clues will help you spot things if you have to pull it apart too