A little bit with 24mm (not bad though), it's an older design before 24 and 25mm's hit.
Sadly I can't find an Authentic so it's a Clone, got it from 3FVape. Not a bad Clone and I actually use it rather often, been pretty happy with it.
Here's a couple of very nice Mech's I've been keeping my eye on. I'm coming damn close on picking them up.
92% pure copper internals (better than copper for conductivity), I damn near got it this weekend, actually got another Nookie V3 instead. I really, really love the Nookie V3 so I got another for my FDA Apocolypse Stash.
Anyway I'm really coming close to pulling the trigger on this one, very close.
http://dragonsdenvapor.com/CURIMAO-by-SILVIS-WORKS-PHILIPPINES-w-PURE-SILVER-CONTACTS-CUR.htm
Here's another excellent Parallel Mod, all copper internals incased in Delrin
http://dragonsdenvapor.com/Hollowpoint-by-Silver-Wolf-Customs-hollow.htm