Would you like to try an earlier peak on it to see if there is a difference? The original torance ( xd 1 ) had the peak vents more to the side, the peaks are interchangeable. If you cover return postage you're welcome to try my old one. ( grey)
I'm a bit confused though, my xd4 peak only has the one set of holes, so I'm not sure what you mean by some of he smaller holes??? Picture?
Have you tried it ithout peak o make bsolutely sure it's the peak??