Didn't even notice the extra holes till it was mentioned. I can't compare to what it was before, since these are my first ones. Ordered 2) 3ml phoenix bc sleeved, and one has 2 holes and the other has 4. Not sure about the sleeve and pen top, gets top heavy, looks cool though, but on my 1000 ego twist, it's ridiculously long, but I'll get used to it, just like I got used to the length of the twist. Will try on my 650 twist and see how that is. My sleeve doesn't slide around, stays put till I move it, which sometimes I do move it above the airholes to test out which I prefer better. I really really like these phoenix...and so glad I got them, been patiently waiting...and patience paid off. btw...thanks for the extra fast ship. Was waiting for me when I got home from a camping trip.