A hint for aspiring artists, yes, even including those who do your work manga style. If your work is entirely done in English, and you intend for it to have narrative comprehensibility, put your panels and action left to right.
Putting them right to left does not enhance the Manga style; it creates a distinct, unpleasant conflict between how you read and how you take visual input. It shatters narrative flow. If it is your INTENT to do so, you might want to include a better warning than a tiny little warning at the top that says "Remember, read right to left." That doesn't help, and just induces irritation, rather than whatever you intended to do with such a conflict.
For example, http://gipcomic.com
seemed to be shaping up as an interesting comic about the afterlife. But the more I read, the more literal nausea I felt from the rearrangement of focus from panel to panel. You're NOT being helpful. And if it isn't your intent to create input flow conflict, please, for the love of Art, don't try to produce a left to right visual story in a right to left format, as it will negatively impact the reader-art synthesis.