5vz, can you please confirm the venting cap has holes or a slot?
Do you mean under air control ring?
If so, it has 4 precision holes under the ring.
This one is old school, it truly is the best vape you can get. Brass extension, knurled knob, eight precision holes on bottom (where spring is), knurled top two portions on tank where drip tip goes. Hold on. Air control ring has 7 smooth vertical deep lines, very smooth - not what I would say grooves, so very smooth they are almost un-noticeable for feel, but very pleasing to see and way so smooth, like a bathtub curve, eh, yeah, I don't think bathtub was the idea for Imeo. Let him use words for that.
Where the drip tip is, there is not any holes or vents. Just knurled top parts, 2 of them.
ETA: I forget. I am looking for video. I have an old GGTS with an AVS. BRB.
ETAA: Okay, here is the nickel part for allergy issues. The AVS tank part is what you inhale from, my bad on forgetting part names, and same GGTS model too. I did not send anything back to Imeo, don't like posting this video. I bought mine 2nd hand ECF, a few years back as you can see.:
http://www.youtube.com/watch?v=Bp_nV4mP9eY