I sent you a private message in response to this...not sure if you saw it or not. I have never tried Zen tubes, but will check to see if they possibly have them at my local smoke shop. I always get either Golden Harvest, or Gambler menthol tubes, and use menthol tobacco as well (love my strong menthol taste). However, I have never been much of a fan of the 100s which could be an issue for me when it comes to the Zen tubes!
I started when I was 13 my mom caught me at 15 and let me smoke I’m 38 now I quit about 10 years ago and started back last year I have fell in love with Marlboro nxts I didn’t use to like menthol but I do now lol