I went through the stage and noticed it makes more sense to drop sooner in that certain enemy screen and go through a wall before that large time save zip skip. I had to find out fast so I used U+D+R method. This saves additional 8 frames.
I updated my work after watching icu's published movie. I found a better way to utilize pause method at the cloud area of Airman stage as a bonus. Heatman, Crashman and Woodman contains overall quite a lot of improvements.
Air = 88 frames saved (Bird copy needs some attention cause a zip before boss might be possible)
Heat = 35 frames saved (One lag frame bothers me and I need to check this out again)
Crash = 80 frames saved (Left tube and Item 2 method seems to be pretty good)
Wood = 104 frames saved (Item 1 manipulations and compromises, might need some poking)
Bubble = Still testing and I want to save Item 1s for stacked setups.
Because of nostalgia, I decided to open Rockman Exile up and see what I can do. I've entered the boss door 4 frames faster so far at Airman. I found better positions and subpixels to make clouds to appear sooner. I also managed to fetch some subpixels from random places.