ok....after enormous leaks after top filling, finally i got it right.
no matter what is your wicking method, how dense it is, the crucial point is YOU HAVE TO REST YOUR WICK TO THE BACK GROOVE OF JUICE CHANNELS. don't leave any hole on the back sides.
put some juice first on the wicks.... set the wicks to the back groove by tweezers/screwdriver then snap it to the glass section.
- some people prefer to leave "tail" on the juice channels, it's OK, specially for thinner juice (<50 VG).
- some prefer to cut it right at the deck's edge (just like me

), it's fine too.