I have one I rebuild the other I use prebuilt coils. I have never tried to top fill either one.I had 3 until I Vaped one forward, still use the two. Only time they ever leaked was either bad gasket or when I messed up the wicking on the rba. I always use the top fill.
I love my Crowns for the reason of great flavor and top fill, I won't buy a tank without it
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I might try that today ?
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