Orchid Stem Propagation

[pedecamera]

The other day I was reading a story by Linda Fortner. . . Orchid Stem Propagation
Now I am really pumped to give this a try. . . seems a little easier them the seeds stuff.

I do have a few question in regards with this article.
1. in the list of tools needed. . . Sterile culture tubes with one hole stoppers. . . . and the cotton do I read right that you do not really seal off the tube? like using a cork or rubber lid? so with cotton there is some air movement?

2. selecting a stem. I was looking at the stem of a flowering Phal. starting from the plant ( bottom ) I count about 6 "sections ??buds?? before the flowers start.
in this process are these the buds? we need for propagation right? these are on the stem below the flowers.

Those are the question I have this time. . . I am sure when I try I will run in problems and will mess things up.
Once the blooms are done I will practice on the stem I think. . . practice is the word. . . will not actually hope to grow anything.

Thanks
Peter