Yes, noticeably tighter than a Kayfun. The fact that you mentioned lung hit originally makes me think you'll probably think it's like sucking through a coffee stirrer lol... It's too tight for me to take long draws, I have to puff/prime/puff/prime then inhale. Here's a video (he does great build videos also) that shows a good example of how you'd vape the sat22:
Sat22 + mcr =Great!! - YouTube
As for drip tips, some of mine fit and some are a bit too long. The drip tip base is 5mm, anything longer will create a gap. Luckily all my favorite ones fit, although I prefer the stock one because the look and also the bore seems to match the airflow perfectly. The vape just feels off with wider bores.
Yeah, can't imagine how you'd drill out the inner hole on the Nahualon.
Update: had some time to play with it today so when I swapped liquids I tried using rayon again and got it working pretty well. I was simply using too much originally. A denser vape and flavor is close to mesh. I'm getting a better flavor from my fruit liquid which is supposed to excel in mesh. One day I'll have to find someone that has mastered mesh and try their builds. I've gotten the builds working properly but feel like maybe there's a secret I'm missing.