Sometimes I will have to use a pare of pliers or Vise-Grips (locking pliers) to hold my coin to losen my P3 connectionIf you use the beauty ring to try to hide the gap, be very careful about any twisting of the attie, some, myself included have encountered the dreaded locked attie syndrome where the different thread pitches of the 510 connector and the beauty ring create a lock nut type bond with your atomizer.
My solution to the ProVari gap has been to make spacers out of differing thickness materials, so I can snug an attie onto my mods without any gap. Some experimentation required, and they can be easily made with a circle cutter and a paper punch. Good luck! :
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I set my Radius on a hard surface so I can push down on the coin while I turn it, so coin doesn't slip out of the slots an scratch or damage the slots.