which size???

[harmonic]

ITS NOT A SCREW. turning it only lets it reseat in the gasket. in almost every case turning the center pin like a screw will KILL the carto. ce2 type cartos the insides will twist before they break so you might have a little bit to play with.
the only time i have ever seen the center pin actually be threaded and adjustable is on an 808 to 510 adapter and ect lol...

 

[emonty]

I tried the regular and the mini, both are great, run them at around 3.5 ohm. Just ordered another ten mini's as I don't want to refill often. The 2.5 ml is perfect, the draw is good, excellent flavor.

 

[Syn007]

ITS NOT A SCREW. turning it only lets it reseat in the gasket. in almost every case turning the center pin like a screw will KILL the carto. ce2 type cartos the insides will twist before they break so you might have a little bit to play with.
the only time i have ever seen the center pin actually be threaded and adjustable is on an 808 to 510 adapter and ect lol...

Yes, you are right. The center post can be raised too by pushing hard on the coil cup. I happen to get a 2nd vision that got the same leaky issue, this time a micro stretch. Again, i have to play with the position of the center post. That is 2 out of the 6 i've opened. I'm waiting for another 10 regulars to come and i hope i won't get a third.