I think the SS are predrilled and the ali you have a choice for it to be drilled or not
Ukeman,,,
You won't like the Bulli.
It's too easy of a draw, based on your comments here, & others I've seen on the ECF.
The air hole could be covered & made tighter, but you wouldn't like it without modification. I don't expect the Mark Infinity to be any different.
Perhaps you could have Bulli reduce the size of your air hole.
Yep.Upgrade kits I believe you have to drill yourself, but the full A2/A2-T/A2-MegaT are predrilled.
Yep.
Another way of getting a tighter draw is to put the coil in front of the air hole instead of on the other side of the screws, or use two coils.
As long as giant tasty flumes of vapor get injected into my lungs I'm a happy camper, no matter how airy the draw. But that's just me.